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 one of the following acids is used in battery?

  1. Hydrochloric acid

  2. Hydrofluoric acid

  3. Sulphuric acid

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

Sulphuric acid is the primary electrolyte used in lead-acid batteries, commonly found in automobiles and UPS systems. It's chosen because it's relatively inexpensive, has good conductivity, and participates in reversible chemical reactions during charging and discharging. Hydrochloric acid would corrode metal components, while hydrofluoric acid is extremely hazardous and attacks glass.

Multiple choice

Which of the following statements is/are false?

a. Non-metal oxides are acidic in nature. b. In pure water, the concentration of hydrogen ions and hydroxide ions are equal. c. The pH of a solution is directly proportional to the concentration of hydrogen ions in it.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. The pH of a solution is inversely proportional to the concentration of hydrogen ions in it.

Multiple choice

Which of the following statements is/are false?

a. The salts of hydrochloric acid are called 'chlorides'. b. A solution of pH 14 will be a weaker base than another solution of pH 10. c. Sulphurous acid is a weak acid because it ionises partially in water to form a small amount of hydrogen ions.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. A solution of pH 14 will be a much more stronger base than another solution of pH 10.

Multiple choice

Which of the following statements is/are false?

a. An ant's sting injects methanoic acid into the skin of a person causing burning pain. b. Antacids are a group of mild bases having no toxic effect on the human body. c. Calcium hydroxide is added to the acidic lake water to neutralise the acid that comes from acid rain.

  1. Only a

  2. Only b and a

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. Calcium carbonate is added to the acidic lake water to neutralise the acid that comes from acid rain.

Multiple choice

Which chemical is called the king of chemicals?

  1. Hydrochloric acid

  2. Nitric acid

  3. Acetic acid

  4. Sulphuric acid

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

Sulfuric acid (H2SO4) is called the 'king of chemicals' because it is the most widely produced and used industrial chemical globally. It's essential for manufacturing fertilizers, chemicals, petroleum refining, and metal processing. The other options are incorrect: hydrochloric acid (HCl) is used in digestion and industry, nitric acid (HNO3) is important for explosives and fertilizers, and acetic acid (CH3COOH) is the main component of vinegar.

Multiple choice

The acid found in vomitting is

  1. butyric acid

  2. 4-Hydroxyphenylpyruvic acid

  3. homogentisic acid

  4. cysteine sulfinic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Butyric acid is found in butter, parmesan cheese, vomit, and as a product of anaerobic fermentation (including in the colon and as body odour). It has an unpleasant smell and acrid taste, with a sweetish aftertaste (similar to ether).