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

Multiple choice

Which of the following the acids is used in car battery?

  1. Hydrochloric acid

  2. Boric acid

  3. Sulphuric acid

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

Lead-acid batteries, commonly used in cars, utilize sulphuric acid as the electrolyte. It reacts with the lead plates to store and release electrical energy.

Multiple choice

Which is the acid contained in the apple?

  1. Mefenamic acid

  2. Ascorbic acid

  3. Nitric acid

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

Malic acid is the predominant organic acid found in apples, making up about 90 percent of the total organic acid content. It is responsible for the sharp, tart flavor of the fruit. The name 'malic' is derived from 'malum', the Latin word for apple.

Multiple choice

Which is the acid contained in the gooseberry?

  1. Mefenamic acid

  2. Ascorbic acid

  3. Malic acid

  4. Nitric acid

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gooseberries, especially the Indian gooseberry or Amla, are exceptionally rich in Vitamin C, which is chemically known as ascorbic acid. This acid provides the fruit with its characteristic sour taste and high antioxidant properties. It is a vital nutrient for immune health and skin repair.

Multiple choice

Match the following acids with their sources:

a. Malic acid 1. Sour milk
b. Acetic acid 2. Apples
c. Lactic acid 3. Proteins
d. Amino acid 4. Vinegar

  1. a - 2, b - 4, c - 1, d - 3

  2. a - 2, b - 4, c - 3, d - 1

  3. a - 4, b - 2, c - 1, d - 3

  4. a - 3, b - 4, c - 1, d - 2

  5. a - 2, b - 1, c - 4, d - 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. The source of malic acid is apple, the source of acetic acid is vinegar, the source of lactic acid is sour milk and the source of amino acids are proteins.

Multiple choice

Which of the following is a mineral acid?

  1. Formic acid

  2. Amino acid

  3. Malic acid

  4. Nitric acid

  5. Acetic acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An acid that is prepared from the minerals of the Earth is called as mineral acid. Nitric acid is a mineral acid.

Multiple choice

Which of the following is an organic acid?

  1. Hydrochloric acid

  2. Sulphuric acid

  3. Phosphoric acid

  4. Oxalic acid

  5. Boric acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Oxalic acid is an organic acid. It is used in various ways such as a rust remover, a cleaning agent on wood working, as stain lifter and as bleaching agent.

Multiple choice

Match the following acids with their formulae:

1. Phosphoric acid a. HCL
2. Nitric acid b. H3PO4
3. Hydrochloric acid c. H2SO4
4. Sulphuric acid d. HNO3

  1. 1 - b, 2 - a, 3 - d, 4 - c

  2. 1 - c, 2 - d, 3 - a, 4 - b

  3. 1 - d, 2 - b, 3 - a, 4 - c

  4. 1 - b, 2 - d, 3 - c, 4 - a

  5. 1 - b, 2 - d, 3 - a, 4 - c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. The formula of phosphoric acid is H3PO4 The formula of nitric acid is HNO3 The formula of hydrochloric acid is HCL The formula of sulphuric acid is H2SO4

Multiple choice

Which of the following pair of ‘compounds - their respective nature’ is not correctly matched?

  1. Carbon dioxide - acidic

  2. SiO2 - acidic

  3. Alumina - Amphoteric

  4. Caro’s acid - dibasic

  5. Sulphuric acid - dibasic
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Caro’s acid (H2SO5) is monobasic on account of the presence of one replaceable hydrogen atom. The presence of one replaceable hydrogen atom is explained by the example of potassium peroxymonosulfate (KHSO5) which is formed by the reaction of H2SO5 with alkali. It is the potassium acid salt of peroxymonosulphuric acid and is widely used as an oxidising agent.

Multiple choice

Water is

  1. acidic

  2. basic

  3. neutral

  4. none of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pure water has a pH of 7 at 25 degrees Celsius, which is defined as neutral. It is neither acidic nor basic.

Multiple choice

Which of the following is not a property of acids?

  1. Acids have a sour taste.

  2. All acid solutions are good conductors of electricity.

  3. They turn blue litmus solution red.

  4. Most of the acids are insoluble in water.

  5. Mineral acids are highly corrosive.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most of the acids are soluble in water.