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Chemical Reactions - Acids MCQs

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Chemical Reactions - Acids

Chemical Reactions - Acids MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which term describes an acid that ionizes only partially in water?
A. Weak acid
B. Strong base
C. Neutral salt
D. Oxidizing metal
Correct Answer: A
Weak acids establish an equilibrium and do not ionize completely in water.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which acid is found naturally in citrus fruits?
A. Perchloric acid
B. Hydrofluoric acid
C. Sulfuric acid
D. Citric acid
Correct Answer: D
Citrus fruits contain citric acid.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which gas is released when an acid reacts with a carbonate?
A. Oxygen
B. Ammonia
C. Hydrogen only
D. Carbon dioxide
Correct Answer: D
Acid-carbonate reactions form a salt, water and carbon dioxide.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which gas is commonly released when many acids react with reactive metals?
A. Chlorine
B. Hydrogen
C. Nitrogen
D. Helium
Correct Answer: B
Acids can react with sufficiently reactive metals to form a salt and hydrogen gas.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
What products are typically formed when an acid reacts with a base?
A. Only hydrogen gas
B. Only oxygen gas
C. Metal and carbon
D. Salt and water
Correct Answer: D
Acid-base neutralization commonly yields salt and water.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
What pH is generally characteristic of an acidic aqueous solution at ordinary conditions?
A. Always 14
B. Less than 7
C. Greater than 7
D. Exactly 7
Correct Answer: B
Acidic solutions have pH below 7 under standard classroom conventions.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
What color does blue litmus paper generally turn in an acidic solution?
A. Blue
B. Black
C. Green
D. Red
Correct Answer: D
Acids turn blue litmus red.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which acid is the main acid in vinegar?
A. Hydrochloric acid
B. Citric acid
C. Acetic acid
D. Sulfuric acid
Correct Answer: C
Vinegar contains dilute acetic acid.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
Which acid is present in gastric juice?
A. Hydrochloric acid
B. Sulfuric acid
C. Acetic acid only
D. Nitric acid
Correct Answer: A
The stomach secretes hydrochloric acid as part of gastric juice.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Acids
According to the Arrhenius definition, an acid increases the concentration of which ion in aqueous solution?
A. OH− ions
B. H+ (or H3O+) ions
C. Cl− ions only
D. Na+ ions only
Correct Answer: B
Arrhenius acids increase hydrogen ion or hydronium ion concentration in water.
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