Acids Bases and Salts 100 MCQ

Question 1

Question 1: Which of these substances is commonly known to have a sour taste?

A. Baking sodaB. SoapC. Lemon juiceD. Sugar

Answer

C. Lemon juice. Acids are typically sour in taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 2

Question 2: What color change would you observe when an acid is added to blue litmus paper?

A. Blue to redB. Red to blueC. No changeD. Blue to green

Answer

A. Blue to red. Acids turn blue litmus paper red. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 3

Question 3: Which of the following is a natural indicator for acids and bases?

A. Methyl orangeB. PhenolphthaleinC. TurmericD. Universal indicator

Answer

C. Turmeric. Turmeric is a natural indicator that changes color in the presence of acids and bases. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 4

Question 4: What taste is generally associated with acids?

A. SweetB. SourC. BitterD. Salty

Answer

B. Sour. Acids have a characteristic sour taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 5

Question 5: Which of these household items is acidic in nature?

A. BleachB. VinegarC. Baking sodaD. Soap

Answer

B. Vinegar. Vinegar contains acetic acid. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 6

Question 6: If you have a solution that turns blue litmus paper red, what can you conclude about it?

A. It is a base.B. It is neutral.C. It is an acid.D. It is a salt.

Answer

C. It is an acid. Acids turn blue litmus paper red. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 7

Question 7: Why is it not advisable to taste substances to identify whether they are acids or bases?

A. It is unscientific.B. Some acids and bases can be harmful.C. It is not a reliable method.D. All of the above

Answer

D. All of the above. Tasting unknown substances is unsafe, and there are more reliable and safer methods to identify acids and bases. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 8

Question 8: Which of these substances is commonly known to have a bitter taste?

A. Lemon juiceB. VinegarC. SoapD. Sugar

Answer

C. Soap. Bases are typically bitter in taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 9

Question 9: What color change would you observe when a base is added to red litmus paper?

A. Red to blueB. Blue to redC. No changeD. Red to green

Answer

A. Red to blue. Bases turn red litmus paper blue. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 10

Question 10: Which of the following is a common property of bases?

A. They feel slippery.B. They taste sour.C. They turn blue litmus paper red.D. They react with metals to produce hydrogen gas.

Answer

A. They feel slippery. Bases have a characteristic slippery feel. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 11

Question 11: Which of these household items is basic in nature?

A. VinegarB. Lemon juiceC. Baking sodaD. Orange juice

Answer

C. Baking soda. Baking soda is sodium bicarbonate, a base. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 12

Question 12: If you have a solution that turns red litmus paper blue, what can you conclude about it?

A. It is an acid.B. It is neutral.C. It is a base.D. It is a salt.

Answer

C. It is a base. Bases turn red litmus paper blue. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 13

Question 13: What happens when a base is rubbed on a white cloth stained with curry?

A. The stain becomes reddish-brown.B. The stain disappears completely.C. The stain turns yellow.D. There is no change in the stain.

Answer

A. The stain becomes reddish-brown. Turmeric in curry acts as a natural indicator and changes color in the presence of a base. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 14

Question 14: Why should you handle strong bases with care?

A. They can be corrosive.B. They can cause stains.C. They have a strong odor.D. They are flammable.

Answer

A. They can be corrosive. Strong bases can cause chemical burns and should be handled with caution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 15

Question 15: What is the reaction between an acid and a base called?

A. OxidationB. ReductionC. NeutralizationD. Decomposition

Answer

C. Neutralization. The reaction between an acid and a base is called neutralization. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 16

Question 16: What is the general product formed in a neutralization reaction?

A. Acid and waterB. Base and waterC. Salt and waterD. Acid and base

Answer

C. Salt and water. Neutralization reactions typically produce salt and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 17

Question 17: If someone is suffering from acidity, which of the following would you suggest as a remedy?

A. Lemon juiceB. VinegarC. Baking soda solutionD. Orange juice

Answer

C. Baking soda solution. Baking soda is a base and can help neutralize excess stomach acid. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 18

Question 18: What happens when an acid reacts with a base?

A. They enhance each other’s effects.B. They form a new acid and a new base.C. They cancel out each other’s effects.D. They produce a gas.

Answer

C. They cancel out each other’s effects. Acids and bases neutralize each other’s properties. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 19

Question 19: Which of the following is an example of a neutralization reaction in daily life?

A. Digestion of food in the stomachB. Baking a cakeC. Rusting of ironD. Burning of wood

Answer

A. Digestion of food in the stomach. Stomach acid is neutralized by bases in the digestive system. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 20

Question 20: What is the purpose of an antacid?

A. To increase acidityB. To neutralize excess acidC. To cause a burning sensationD. To promote digestion

Answer

B. To neutralize excess acid. Antacids contain bases that neutralize stomach acid, providing relief from acidity. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 21

Question 21: What gas is usually produced when an acid reacts with a metal?

A. OxygenB. HydrogenC. Carbon dioxideD. Nitrogen

Answer

B. Hydrogen. Acids react with metals to produce hydrogen gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 22

Question 22: Which of the following metals is most reactive with acids?

A. CopperB. GoldC. MagnesiumD. Silver

Answer

C. Magnesium. Magnesium is a highly reactive metal and readily reacts with acids. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 23

Question 23: What is the product formed when zinc reacts with hydrochloric acid?

A. Zinc chloride and oxygenB. Zinc chloride and hydrogenC. Zinc oxide and waterD. Zinc oxide and hydrogen

Answer

B. Zinc chloride and hydrogen. Zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 24

Question 24: Why do we not store lemon pickle in aluminum utensils?

A. Aluminum is a poor conductor of heat.B. Aluminum reacts with the acid in the pickle.C. Aluminum is expensive.D. Aluminum is not aesthetically pleasing.

Answer

B. Aluminum reacts with the acid in the pickle. The acid in the pickle can react with aluminum, forming harmful compounds and spoiling the pickle. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 25

Question 25: Which of the following is a common observation when an acid reacts with a metal?

A. Formation of a precipitateB. Change in colorC. Effervescence (bubbles of gas)D. All of the above

Answer

D. All of the above. The reaction of an acid with a metal can result in the formation of a precipitate, a change in color, and the release of gas bubbles (effervescence). (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 26

Question 26: What precautions should be taken when handling the reaction of an acid with a metal?

A. The reaction should be performed in a well-ventilated area.B. Protective gear, such as gloves and goggles, should be worn.C. The reaction should be performed under the supervision of a teacher or adult.D. All of the above

Answer

D. All of the above. Safety precautions are essential when working with acids and metals. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 27

Question 27: Why are some metals less reactive than others with acids?

A. They have a lower tendency to lose electrons.B. They have a higher melting point.C. They are denser.D. They are more abundant.

Answer

A. They have a lower tendency to lose electrons. The reactivity of metals with acids depends on their ability to lose electrons and form positive ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 28

Question 28: What is the role of the acid in the reaction with a metal?

A. It acts as a catalyst, speeding up the reaction without being consumed.B. It acts as a reactant, providing hydrogen ions for the reaction.C. It acts as an inhibitor, slowing down the reaction.D. It acts as a solvent, dissolving the metal to facilitate the reaction.

Answer

B. It acts as a reactant, providing hydrogen ions for the reaction. Acids are directly involved in the reaction with metals, supplying the hydrogen ions (H+) that are replaced by the metal ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 29

Question 29: What gas is produced when an acid reacts with a metal carbonate?

A. HydrogenB. OxygenC. Carbon dioxideD. Nitrogen

Answer

C. Carbon dioxide. Acids react with metal carbonates to produce carbon dioxide gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 30

Question 30: What happens when carbon dioxide gas is passed through lime water?

A. The lime water turns milky.B. The lime water turns blue.C. The lime water turns red.D. There is no change in the lime water.

Answer

A. The lime water turns milky. Carbon dioxide reacts with lime water (calcium hydroxide) to form a white precipitate of calcium carbonate, making the solution appear milky. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 31

Question 31: Which of the following is a product of the reaction between baking soda and vinegar?

A. Carbon dioxideB. HydrogenC. OxygenD. Nitrogen

Answer

A. Carbon dioxide. Baking soda (sodium bicarbonate) reacts with vinegar (acetic acid) to produce carbon dioxide gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 32

Question 32: What is the chemical name of baking soda?

A. Sodium carbonateB. Sodium hydroxideC. Sodium chlorideD. Sodium bicarbonate

Answer

D. Sodium bicarbonate. Baking soda is chemically known as sodium bicarbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 33

Question 33: Why does a cake rise when baking powder is added to the batter?

A. Baking powder releases oxygen gas, which makes the cake rise.B. Baking powder reacts with water to produce hydrogen gas, which makes the cake rise.C. Baking powder reacts with acids in the batter to produce carbon dioxide gas, which makes the cake rise.D. Baking powder caramelizes the sugar in the batter, causing it to expand and make the cake rise.

Answer

C. Baking powder reacts with acids in the batter to produce carbon dioxide gas, which makes the cake rise. Baking powder contains sodium bicarbonate and an acid. When mixed with the batter and heated, they react to produce carbon dioxide gas, creating bubbles that make the cake rise. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 34

Question 34: What is the test for carbon dioxide gas?

A. It turns lime water milky.B. It relights a glowing splint.C. It burns with a pop sound.D. It has a pungent odor.

Answer

A. It turns lime water milky. This is a characteristic test for carbon dioxide gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 35

Question 35: What is the chemical formula of calcium carbonate?

A. CaCO₃B. Ca(OH)₂C. CaCl₂D. CaO

Answer

A. CaCO₃. This is the chemical formula for calcium carbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 36

Question 36: Which of the following is a common use of sodium bicarbonate?

A. As an antacidB. In fire extinguishersC. In baking powderD. All of the above

Answer

D. All of the above. Sodium bicarbonate has various uses due to its mild basic nature and ability to release carbon dioxide gas. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 37

Question 37: What is the product formed when sodium hydroxide reacts with hydrochloric acid?

A. Sodium chloride and waterB. Sodium carbonate and waterC. Sodium bicarbonate and waterD. Sodium hydroxide and chlorine

Answer

A. Sodium chloride and water. This is a classic example of a neutralization reaction. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 38

Question 38: What is the pH of a neutral solution?

A. 0B. 7C. 14D. 1

Answer

B. 7. A neutral solution has a pH of 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 39

Question 39: What is the indicator phenolphthalein used for?

A. To test for the presence of oxygen gasB. To distinguish between acids and basesC. To measure the temperature of a solutionD. To identify the presence of metal ions

Answer

B. To distinguish between acids and bases. Phenolphthalein is colorless in acidic solutions and pink in basic solutions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 40

Question 40: What is the general equation for a neutralization reaction?

A. Acid + Base → Salt + WaterB. Acid + Metal → Salt + HydrogenC. Metal Carbonate + Acid → Salt + Carbon Dioxide + WaterD. Metal Oxide + Acid → Salt + Water

Answer

A. Acid + Base → Salt + Water. This is the general form of a neutralization reaction. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 41

Question 41: What is the role of water in a neutralization reaction?

A. It acts as a reactant.B. It acts as a product.C. It acts as a catalyst.D. It acts as an inhibitor.

Answer

B. It acts as a product. Water is one of the products formed in a neutralization reaction. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 42

Question 42: What is the nature of metallic oxides?

A. AcidicB. BasicC. NeutralD. Amphoteric

Answer

B. Basic. Metallic oxides are generally basic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 43

Question 43: What is the product formed when copper oxide reacts with hydrochloric acid?

A. Copper chloride and waterB. Copper carbonate and waterC. Copper bicarbonate and waterD. Copper hydroxide and chlorine

Answer

A. Copper chloride and water. Copper oxide, a basic oxide, reacts with hydrochloric acid to form copper chloride (a salt) and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 44

Question 44: What is the color of the solution formed when copper oxide reacts with hydrochloric acid?

A. Blue-greenB. Red-brownC. YellowD. Colorless

Answer

A. Blue-green. The solution of copper chloride formed is typically blue-green. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 45

Question 45: What is the general equation for the reaction of a metallic oxide with an acid?

A. Metal Oxide + Acid → Salt + WaterB. Metal Oxide + Base → Salt + WaterC. Metal Oxide + Metal → Salt + WaterD. Metal Oxide + Acid → Base + Water

Answer

A. Metal Oxide + Acid → Salt + Water. This is the general form of the reaction between a metallic oxide and an acid. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 46

Question 46: What is the nature of non-metallic oxides?

A. AcidicB. BasicC. NeutralD. Amphoteric

Answer

A. Acidic. Non-metallic oxides are generally acidic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 47

Question 47: What is the product formed when carbon dioxide reacts with calcium hydroxide?

A. Calcium chloride and waterB. Calcium carbonate and waterC. Calcium bicarbonate and waterD. Calcium oxide and carbon monoxide

Answer

B. Calcium carbonate and water. Carbon dioxide, an acidic oxide, reacts with calcium hydroxide (a base) to form calcium carbonate (a salt) and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 48

Question 48: Which of the following is an example of a non-metallic oxide?

A. Sodium oxideB. Calcium oxideC. Sulfur dioxideD. Magnesium oxide

Answer

C. Sulfur dioxide. Sulfur dioxide is a non-metallic oxide. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 49

Question 49: What is the environmental impact of acidic non-metallic oxides like sulfur dioxide?

A. They contribute to global warming.B. They cause ozone layer depletion.C. They cause acid rain.D. They deplete oxygen levels in water bodies.

Answer

C. They cause acid rain. Sulfur dioxide and other acidic oxides can dissolve in rainwater, forming acids and leading to acid rain. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 50

Question 50: What is the general equation for the reaction of a non-metallic oxide with a base?

A. Non-metallic Oxide + Base → Salt + WaterB. Non-metallic Oxide + Acid → Salt + WaterC. Non-metallic Oxide + Metal → Salt + WaterD. Non-metallic Oxide + Base → Acid + Water

Answer

A. Non-metallic Oxide + Base → Salt + Water. This is the general form of the reaction between a non-metallic oxide and a base. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 51

Question 51: What is the chemical formula for hydronium ion?

A. H₂OB. H₃O⁺C. OH⁻D. H₂O₂

Answer

B. H₃O⁺. The hydronium ion is formed when a hydrogen ion (H⁺) combines with a water molecule. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 52

Question 52: Why do acids conduct electricity in aqueous solutions?

A. They release electrons.B. They release protons.C. They produce ions.D. They form a precipitate.

Answer

C. They produce ions. Acids dissociate in water to produce ions, which are responsible for conducting electricity. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 53

Question 53: Why does dry HCl gas not change the color of dry litmus paper?

A. HCl gas is neutral.B. HCl gas does not react with litmus.C. HCl gas does not produce ions in the absence of water.D. Litmus paper only reacts with liquid solutions.

Answer

C. HCl gas does not produce ions in the absence of water. The acidic character of HCl is due to the formation of hydrogen ions (H⁺), which only occurs when HCl is dissolved in water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 54

Question 54: What is the process of dissolving an acid in water called?

A. NeutralizationB. DissociationC. DilutionD. Evaporation

Answer

C. Dilution. Dissolving an acid in water reduces the concentration of ions per unit volume, which is called dilution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 55

Question 55: Why is it recommended to add acid to water and not water to acid while diluting an acid?

A. To prevent a violent reactionB. To ensure proper mixingC. To avoid the mixture from splashing outD. Both A and C

Answer

D. Both A and C. Adding water to a concentrated acid can release a large amount of heat, causing the mixture to splash out and cause burns. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 56

Question 56: What happens to the concentration of H₃O⁺ ions when an acid is diluted?

A. It increases.B. It decreases.C. It remains the same.D. It becomes zero.

Answer

B. It decreases. Dilution reduces the concentration of ions in the solution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 57

Question 57: What happens to the concentration of OH⁻ ions when excess base is dissolved in a solution of sodium hydroxide?

A. It increases.B. It decreases.C. It remains the same.D. It becomes zero.

Answer

A. It increases. Dissolving more base increases the concentration of hydroxide ions in the solution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 58

Question 58: Which of the following is true about alkalis?

A. All bases are alkalis.B. Alkalis are bases that dissolve in water.C. Alkalis are acidic in nature.D. Alkalis do not produce ions in solution.

Answer

B. Alkalis are bases that dissolve in water. Not all bases dissolve in water; those that do are called alkalis. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 59

Question 59: What ions are produced when HCl is dissolved in water?

A. H⁺ and Cl⁻B. H⁺ and OH⁻C. Na⁺ and Cl⁻D. Na⁺ and OH⁻

Answer

A. H⁺ and Cl⁻. Hydrochloric acid dissociates in water to produce hydrogen ions (H⁺) and chloride ions (Cl⁻). (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 60

Question 60: What ions are produced when NaOH is dissolved in water?

A. Na⁺ and OH⁻B. H⁺ and OH⁻C. Na⁺ and Cl⁻D. H⁺ and Cl⁻

Answer

A. Na⁺ and OH⁻. Sodium hydroxide dissociates in water to produce sodium ions (Na⁺) and hydroxide ions (OH⁻). (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 61

Question 61: What is the difference between a strong acid and a weak acid?

A. A strong acid is more concentrated than a weak acid.B. A strong acid produces more H⁺ ions than a weak acid of the same concentration.C. A strong acid has a higher pH than a weak acid.D. A strong acid is less corrosive than a weak acid.

Answer

B. A strong acid produces more H⁺ ions than a weak acid of the same concentration. The strength of an acid is determined by its degree of dissociation in water and its ability to produce hydrogen ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 62

Question 62: Which of the following is a strong acid?

A. Acetic acidB. Citric acidC. Hydrochloric acidD. Carbonic acid

Answer

C. Hydrochloric acid. Hydrochloric acid is a strong acid because it almost completely dissociates in water, releasing a high concentration of hydrogen ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 63

Question 63: Which of the following is a strong base?

A. Ammonium hydroxideB. Sodium hydroxideC. Magnesium hydroxideD. Calcium hydroxide

Answer

B. Sodium hydroxide. Sodium hydroxide is a strong base because it dissociates completely in solution, releasing a high concentration of hydroxide ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 64

Question 64: What is the meaning of the term “dissociation” in the context of acids and bases?

A. The process of forming a precipitateB. The process of an acid reacting with a baseC. The process of ions separating when a substance dissolves in waterD. The process of diluting an acid or base

Answer

C. The process of ions separating when a substance dissolves in water. Dissociation refers to the separation of ions when an acid or base dissolves in water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

D. All of the above. The concentration of ions is directly related to the properties and strength of an acid or base. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. Power of hydrogen. pH is a measure of the power of hydrogen ions in a solution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. 6-8. A neutral solution has a pH around 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. 0-7. Acidic solutions have a pH less than 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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B. 7-14. Basic solutions have a pH greater than 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. A solution with pH 1. Lower pH values indicate a higher concentration of hydrogen ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. A solution with pH 14. Higher pH values indicate a higher concentration of hydroxide ions. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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B. 7. Pure water is neutral and has a pH of 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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B. A mixture of indicators that produces a continuous range of colors over a wide pH range. A universal indicator provides a visual indication of the pH of a solution over a wide range. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. 7.35 – 7.45. Human blood is slightly alkaline. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. To ensure the availability of nutrients to plants. Different plants thrive in different pH ranges. Maintaining the appropriate pH ensures that essential nutrients are available to the plants. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. Rain with a pH lower than 5.6. Acid rain is caused by the presence of acidic pollutants in the atmosphere. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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D. All of the above. Acid rain has numerous negative impacts on the environment and human-made structures. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. Bacteria in the mouth produce acids that damage the enamel of teeth. When bacteria in the mouth break down sugars, they produce acids that can demineralize tooth enamel, leading to cavities. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. Both A and B. Different parts of the digestive system have different pH levels to facilitate various digestive processes. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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D. All of the above. The pH of water bodies is crucial for the health and survival of aquatic life. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. A substance formed by the reaction of an acid with a base. Salts are ionic compounds formed by the neutralization reaction between an acid and a base. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. Sodium chloride. Hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to produce sodium chloride (NaCl) and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. KNO₃. This is the chemical formula for potassium nitrate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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B. Magnesium sulfate. Sulfuric acid (H₂SO₄) reacts with magnesium oxide (MgO) to form magnesium sulfate (MgSO₄) and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. Neutralization reaction. The reaction between an acid and a base is called a neutralization reaction, and it results in the formation of a salt and water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. Neutral. A salt formed from a strong acid and a strong base will produce a neutral solution with a pH of 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. Acidic. A salt formed from a strong acid and a weak base will produce an acidic solution with a pH less than 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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B. Basic. A salt formed from a weak acid and a strong base will produce a basic solution with a pH greater than 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. Ammonium chloride (NH₄Cl). Ammonium chloride is formed from a weak base (ammonium hydroxide) and a strong acid (hydrochloric acid), resulting in an acidic solution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

D. Sodium acetate (CH₃COONa). Sodium acetate is formed from a weak acid (acetic acid) and a strong base (sodium hydroxide), resulting in a basic solution. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. Sodium chloride. Common salt is chemically known as sodium chloride. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. NaCl. This is the chemical formula for sodium chloride. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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C. Evaporation. Salt is obtained from seawater by evaporating the water, leaving behind the salt crystals. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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A. A concentrated solution of sodium chloride in water. Brine is a highly concentrated solution of salt in water. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

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D. All of the above. Common salt is a raw material for the production of various chemicals, including soap, washing soda, and baking soda. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. Water that is chemically combined in a fixed ratio with the salt in its crystalline form. Water of crystallization is an integral part of the crystal structure of some salts. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. CaSO₄.2H₂O. Gypsum is calcium sulfate dihydrate, meaning it contains two molecules of water of crystallization per formula unit. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

A. It turns white. Hydrated copper sulfate is blue due to the presence of water of crystallization. Upon heating, it loses the water molecules and turns white. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

B. Dehydration. The process of removing water of crystallization from a hydrated salt is called dehydration. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Accepted Answer

B. A salt that does not contain water of crystallization. An anhydrous salt is one that has had its water of crystallization removed. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Acids Bases and Salts 100 MCQ

I: Understanding Acids and Bases

1.1 Definition and Properties of Acids

Question 4: What taste is generally associated with acids?A. SweetB. SourC. BitterD. SaltyShow ExplanationCorrect Answer: B. Sour. Acids have a characteristic sour taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 5: Which of these household items is acidic in nature?A. BleachB. VinegarC. Baking sodaD. SoapShow ExplanationCorrect Answer: B. Vinegar. Vinegar contains acetic acid. (Acids Bases and Salts 100 MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

1.2 Definition and Properties of Bases

Question 8: Which of these substances is commonly known to have a bitter taste?A. Lemon juiceB. VinegarC. SoapD. SugarShow ExplanationCorrect Answer: C. Soap. Bases are typically bitter in taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

Question 12: If you have a solution that turns red litmus paper blue, what can you conclude about it?A. It is an acid.B. It is neutral.C. It is a base.D. It is a salt.Show ExplanationCorrect Answer: C. It is a base. Bases turn red litmus paper blue. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

1.3 Neutralization Reaction

II: Chemical Properties of Acids and Bases

2.1 Reaction of Acids with Metals

Question 22: Which of the following metals is most reactive with acids?A. CopperB. GoldC. MagnesiumD. SilverShow ExplanationCorrect Answer: C. Magnesium. Magnesium is a highly reactive metal and readily reacts with acids. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

2.2 Reaction of Acids with Metal Carbonates and Bicarbonates

Question 32: What is the chemical name of baking soda?A. Sodium carbonateB. Sodium hydroxideC. Sodium chlorideD. Sodium bicarbonateShow ExplanationCorrect Answer: D. Sodium bicarbonate. Baking soda is chemically known as sodium bicarbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 35: What is the chemical formula of calcium carbonate?A. CaCO₃B. Ca(OH)₂C. CaCl₂D. CaOShow ExplanationCorrect Answer: A. CaCO₃. This is the chemical formula for calcium carbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

2.3 Reaction of Acids and Bases with Each Other (Neutralization)

Question 38: What is the pH of a neutral solution?A. 0B. 7C. 14D. 1Show ExplanationCorrect Answer: B. 7. A neutral solution has a pH of 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

2.4 Reaction of Metallic Oxides with Acids

Question 42: What is the nature of metallic oxides?A. AcidicB. BasicC. NeutralD. AmphotericShow ExplanationCorrect Answer: B. Basic. Metallic oxides are generally basic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

2.5 Reaction of Non-metallic Oxides with Bases

Question 46: What is the nature of non-metallic oxides?A. AcidicB. BasicC. NeutralD. AmphotericShow ExplanationCorrect Answer: A. Acidic. Non-metallic oxides are generally acidic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

III: Acids, Bases, and Ions

3.1 The Role of Water in Acid and Base Solutions

Question 51: What is the chemical formula for hydronium ion?A. H₂OB. H₃O⁺C. OH⁻D. H₂O₂Show ExplanationCorrect Answer: B. H₃O⁺. The hydronium ion is formed when a hydrogen ion (H⁺) combines with a water molecule. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

3.2 Dissociation of Acids and Bases in Water

IV: The pH Scale

4.1 Measuring Acidity and Alkalinity

Question 67: What is the pH range of a neutral solution?A. 0-3B. 3-6C. 6-8D. 8-14Show ExplanationCorrect Answer: C. 6-8. A neutral solution has a pH around 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

Question 4: What taste is generally associated with acids?
A. SweetB. SourC. BitterD. Salty
Show Explanation
Correct Answer: B. Sour. Acids have a characteristic sour taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 5: Which of these household items is acidic in nature?
A. BleachB. VinegarC. Baking sodaD. Soap
Show Explanation
Correct Answer: B. Vinegar. Vinegar contains acetic acid. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 8: Which of these substances is commonly known to have a bitter taste?
A. Lemon juiceB. VinegarC. SoapD. Sugar
Show Explanation
Correct Answer: C. Soap. Bases are typically bitter in taste. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 22: Which of the following metals is most reactive with acids?
A. CopperB. GoldC. MagnesiumD. Silver
Show Explanation
Correct Answer: C. Magnesium. Magnesium is a highly reactive metal and readily reacts with acids. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 32: What is the chemical name of baking soda?
A. Sodium carbonateB. Sodium hydroxideC. Sodium chlorideD. Sodium bicarbonate
Show Explanation
Correct Answer: D. Sodium bicarbonate. Baking soda is chemically known as sodium bicarbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 35: What is the chemical formula of calcium carbonate?
A. CaCO₃B. Ca(OH)₂C. CaCl₂D. CaO
Show Explanation
Correct Answer: A. CaCO₃. This is the chemical formula for calcium carbonate. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 38: What is the pH of a neutral solution?
A. 0B. 7C. 14D. 1
Show Explanation
Correct Answer: B. 7. A neutral solution has a pH of 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 42: What is the nature of metallic oxides?
A. AcidicB. BasicC. NeutralD. Amphoteric
Show Explanation
Correct Answer: B. Basic. Metallic oxides are generally basic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 46: What is the nature of non-metallic oxides?
A. AcidicB. BasicC. NeutralD. Amphoteric
Show Explanation
Correct Answer: A. Acidic. Non-metallic oxides are generally acidic in nature. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 51: What is the chemical formula for hydronium ion?
A. H₂OB. H₃O⁺C. OH⁻D. H₂O₂
Show Explanation
Correct Answer: B. H₃O⁺. The hydronium ion is formed when a hydrogen ion (H⁺) combines with a water molecule. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)

Question 67: What is the pH range of a neutral solution?
A. 0-3B. 3-6C. 6-8D. 8-14
Show Explanation
Correct Answer: C. 6-8. A neutral solution has a pH around 7. (Acids Bases and Salts 100 MCQ by Top100MCQ.com)