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Chemical Reactions - Bases MCQs

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Chemical Reactions - Bases

Chemical Reactions - Bases MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
Under the Brønsted-Lowry definition, a base is a substance that does what?
A. Donates a proton
B. Donates only neutrons
C. Accepts only electrons by definition
D. Accepts a proton
Correct Answer: D
A Brønsted-Lowry base is a proton acceptor.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
Which ion is produced when ammonia reacts with water as a base?
A. Chloride ion
B. Ammonium ion
C. Nitrate ion only
D. Sulfate ion
Correct Answer: B
Ammonia accepts a proton from water to form NH4+ and OH−.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
Which base is used in making many soaps?
A. Nitric acid
B. Carbon dioxide
C. Sodium chloride
D. Sodium hydroxide
Correct Answer: D
Sodium hydroxide is used in saponification to make hard soaps.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
What is an alkali?
A. Any gas
B. A metal that never reacts
C. Any acid
D. A base that dissolves in water
Correct Answer: D
Alkali is commonly used for water-soluble bases.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
Which household substance is mildly basic?
A. Carbonated water only
B. Vinegar
C. Lemon juice
D. Baking soda solution
Correct Answer: D
Sodium bicarbonate solutions are mildly alkaline.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
What products are commonly formed in acid-base neutralization?
A. Only oxygen
B. Only carbon
C. Salt and water
D. Two metals
Correct Answer: C
Neutralization commonly combines H+ and OH− to make water, leaving a salt.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
Which is a common strong base?
A. Hydrochloric acid
B. Carbon dioxide
C. Sodium hydroxide
D. Acetic acid
Correct Answer: C
Sodium hydroxide dissociates extensively in water to yield hydroxide ions.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
What pH is generally characteristic of a basic aqueous solution?
A. Exactly 7 only
B. Always 0
C. Less than 7
D. Greater than 7
Correct Answer: D
Basic solutions have pH values above 7 under standard classroom conditions.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
What color does red litmus generally turn in a basic solution?
A. Red
B. Blue
C. Yellow
D. Colorless always
Correct Answer: B
Bases turn red litmus blue.
CSS - PMS - CCE - PCS - General Science Chemical Reactions - Bases
According to the Arrhenius definition, a base increases the concentration of which ion in water?
A. OH− ions
B. CO2 molecules
C. Cl− ions
D. H+ ions
Correct Answer: A
Arrhenius bases increase hydroxide ion concentration in aqueous solution.
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