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 statements is not correct?

  1. A base is a compound which contains either oxide or hydroxide ions.

  2. NH3 when dissolved in water, forms an alkaline solution.

  3. A base is an electron acceptor.

  4. An aqueous solution of a base feels soapy to touch.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct answer is option (1).

Multiple choice

Which of the following is not a property of acids?

  1. All acids have a sour taste.

  2. Acids turn blue litmus red.

  3. Acids turn red litmus blue.

  4. All acids form H+ ions in water.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bases turn red litmus blue, so it is not a property of acids. 

Multiple choice

Which of the following is TRUE for basic salts? (i) Formed by partial replacement of hydroxyl groups (ii) Formed by complete replacement of hydroxyl groups (iii) Formed by incomplete neutralisation of a base (iv) Formed by complete neutralisation of a base

  1. (i) or (iv)

  2. (i) or (iii)

  3. (ii) or (iv)

  4. (ii) or (iii)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Salts formed by the partial replacement of hydroxyl groups or incomplete neutralisation of a base are known as basic salts.

Multiple choice

Which of the following statements is true regarding HCO$3^-$?

  1. It is simple, electronegative and basic radical.

  2. It is simple, electronegative and acidic radical.

  3. It is compound, electronegative and basic radical.

  4. It is compound, electronegative and acidic radical.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is compound and acidic radical.

Multiple choice

Identify the correct statement.

  1. H3PO4 is a stronger acid than H2SO4.

  2. HF is a stronger acid than HCl in an aqueous medium.

  3. HClO4 is a weaker acid than HClO3.

  4. HNO3 is a stronger acid than HNO2.

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Polarity along O-H in HNO3 is more in comparision to that in HNO2.