Chemistry
Acids and Bases
594 Questions
Acids and bases questions cover the chemical properties, common examples, and theoretical concepts of acidic and basic substances. Topics include identifying proton acceptors, recognizing amphoteric substances, and knowing the sources of everyday organic acids. These foundational chemistry questions are common across SSC, banking, and railways examinations.
Acid and base propertiesOrganic acidsAmphoteric substancesProton donors and acceptorsChemical formulas
Acids and Bases Questions
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donate more hydrogen ions
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donate more hydroxide ions
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accept more hydroxide ions
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donate more peroxide ions
A
Correct answer
Explanation
The strength of an acid is defined by its ability to dissociate and donate hydrogen ions (protons) in a solution.
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salts
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acids
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bases
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neutral
A
Correct answer
Explanation
Salts are ionic compounds that result from the neutralization reaction between an acid and a base.
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Arrhenius acid
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Arrhenius base
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Bronsted-Lowry acid
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Bronsted-Lowry base
C
Correct answer
Explanation
The Bronsted-Lowry theory defines an acid as any species that is capable of donating a proton (H+).
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Arrhenius acid
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Arrhenius base
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Bronsted-Lowry acid
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Bronsted-Lowry base
D
Correct answer
Explanation
The Bronsted-Lowry theory defines a base as any species that is capable of accepting a proton (H+).
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irritant
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corrosive
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annoying
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brittle
A
Correct answer
Explanation
Substances that are slightly harmful or irritating are labeled as irritants. Corrosive substances are more dangerous and cause chemical burns.
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an equal amount of acids and alkalis
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more acids than alkalis
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more alkalis than acids
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two acids
A
Correct answer
Explanation
Neutralization is the chemical reaction between an acid and an alkali, resulting in the formation of salt and water.
A
Correct answer
Explanation
Litmus paper is a standard pH indicator used to determine if a substance is acidic or alkaline. The other options are either incorrect spellings or unrelated terms.
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Acids
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Alkalis
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Metals
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Neutrals
A
Correct answer
Explanation
Limes and lemons contain citric acid, which gives them their characteristic sour taste. They are acidic substances.
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speeds up
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slows down
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stops
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stays the same
B
Correct answer
Explanation
Enzymes have an optimal pH range. If the environment becomes too acidic or basic, the enzyme's structure is disrupted, causing the reaction rate to decrease.
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sulfur oxides
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ozone
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particles
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hydrogen
A
Correct answer
Explanation
Acid rain is primarily caused by emissions of sulfur dioxide and nitrogen oxides, which react with water vapor in the atmosphere to form sulfuric and nitric acids.
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Gastric Juice
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Sodium hydroxide solution
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Lime water
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Blood plasma
A
Correct answer
Explanation
Gastric juice contains hydrochloric acid, which makes it highly acidic. Sodium hydroxide and lime water are basic, and blood plasma is slightly basic.
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Phosphorous acid
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Phosphoric acid
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Hydrophosphoric acid
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trihydrogen phosphate
B
Correct answer
Explanation
H3PO4 is a common polyprotic acid. The anion PO4(3-) is phosphate, so the acid is named phosphoric acid.
D
Correct answer
Explanation
Hydrofluoric acid is a solution of hydrogen fluoride in water, represented by the chemical formula HF. The other options represent incorrect stoichiometric combinations or non-existent compounds.
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potassium sulfate + hydrogen
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potassium sulfate + water
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sulfate potassium + hydrogen
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sodium sulfate + water
A
Correct answer
Explanation
When a reactive metal like potassium reacts with sulfuric acid, it displaces hydrogen to form a metal sulfate salt and hydrogen gas.
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An acid and a salt
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A salt and some water
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Breakfast!
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A base and a salt
B
Correct answer
Explanation
A neutralization reaction occurs between an acid and a base, which produces a salt and water. This is a fundamental reaction type in chemistry.