Chemistry

Acids and Bases

579 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

Multiple choice

EDTA is a

  1. Monodentate ligand

  2. bidentate ligand

  3. tetradentate ligand

  4. hexadentate ligand
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

EDTA (Ethylenediaminetetraacetic acid) is a hexadentate ligand because it has six donor atoms (four oxygens and two nitrogens) that can bind to a central metal ion simultaneously.

Multiple choice

The acid used in batteries is

  1. acetic acid

  2. hydrochloric acid

  3. sulphuric acid

  4. nitric acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lead-acid batteries, commonly used in vehicles, utilize sulphuric acid as the electrolyte. The acid facilitates the chemical reactions necessary for energy storage and release.

Multiple choice

The gas whose aqueous solution is strongly acidic in nature is

  1. ammonia

  2. phosphine

  3. sulphur dioxide

  4. hydrogen sulphide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sulphur dioxide (SO2) reacts with water to form sulphurous acid (H2SO3), which is a strong acid in aqueous solution. Ammonia forms a basic solution, and hydrogen sulphide is a very weak acid.

Multiple choice

Chemical composition of Aspirin is

  1. phenol

  2. salicylic acid

  3. acetyl salicylic acid

  4. benzoic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aspirin is the common name for acetylsalicylic acid, which is synthesized by the acetylation of salicylic acid.

Multiple choice

The nature of saliva is

  1. neutral

  2. acidic

  3. basic

  4. amphoteric
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Human saliva is slightly acidic, typically having a pH range between 6.2 and 7.6, but generally considered acidic in the context of oral chemistry.

Multiple choice

Which acid is present in sour milk?

  1. Citric acid

  2. Glycollic acid

  3. Acetic acid

  4. Lactic acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lactic acid is produced by the fermentation of lactose by bacteria, which is what causes milk to turn sour.

Multiple choice

Acid present in tamarind is

  1. citric acid

  2. acetic acid

  3. tartaric acid

  4. oxalic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tamarind contains tartaric acid. Citric acid is found in citrus fruits, acetic acid in vinegar, and oxalic acid in spinach.

Multiple choice

Which of the following is an antacid?

  1. Lactic acid

  2. Formic acid

  3. Milk of magnesia

  4. Acetic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Milk of magnesia (magnesium hydroxide) is a common antacid used to neutralize excess stomach acid.

Multiple choice

What is the nature (pH) of urine?

  1. Alkaline

  2. Acidic

  3. Neutral

  4. Can be any
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Normal human urine is typically slightly acidic, with a pH usually ranging between 6.0 and 7.5, depending on diet and metabolic state.