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

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).

Multiple choice

Acidity regulators are food additives which changes or maintains pH .Which of the following compounds is a acidity regulator?

  1. Gluconic acid

  2. Gibberellic acid

  3. Geraniol

  4. γ-Hydroxybutyric acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gluconic acid occurs naturally in fruit, honey, kombucha tea and wine. As a food additive it is an acidity regulator. It is also used in cleaning products where it dissolves mineral deposits especially in alkaline solution.

Multiple choice

Which of the following statement is/are not correct about hydrochloric Acid (HCI)? I. Is a solution of hydrogen chloride (a colorless acidic gas) in water
II. Is corrosive strong multi basic forming only one series of salts the chlorides III. Is used for recovery of zinc from scrap iron IV. Cannot be used for the stomachs of animals of chlorine V. Is also produced in the stomachs of animals for the purpose of digestion

  1. I, II and III

  2. II and IV

  3. V only

  4. III and V
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement II incorrectly describes HCl as 'multi basic' when it's actually monobasic. Statement IV is grammatically incorrect and nonsensical. HCl is monobasic (forms one series of salts), and is naturally produced in the stomach for digestion.

Multiple choice

Among the following compounds -------------------- releases HF upon exposure to water.

  1. sulphur tetrafluoride

  2. xenon difluoride

  3. xenon hexafluoride

  4. nickel(II) fluoride
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sulphur tetrafluoride is the chemical compound. This species exists as a gas at standard conditions. It is a corrosive species that releases dangerous HF upon exposure to water or moisture. Despite these unwelcome characteristics, this compound is a useful reagent for the preparation of organofluorine compounds, some of which are important in the pharmaceutical and chemical industries.

Multiple choice

Which of the following is not a true equilibrium constant?

  1. An acid dissociation constant

  2. The binding constant

  3. A dissociation constant

  4. Conditional constants
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Conditional constants, also known as apparent constants, are concentration quotients which are not true equilibrium constants but can be derived from them. A very common instance is where pH is fixed at a particular value.