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 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.

Multiple choice reactions of acids and bases properties of acids and bases acids, bases and salts acids and bases chemistry

$H _2O _2$ is a:

  1. monobasic acid

  2. dibasic acid

  3. neutral compound

  4. weal alkali
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A dibasic molecule has two replaceable hydrogen atoms. Since $H _2O _2$ has two replaceable hydrogen atoms, That's why it is a dibasic acid.

$H _2O _2\rightarrow HO _2^−+H^+$

$HO _2^−\rightarrow O _2^{−2}+H^+$


$\mathbf{Hence\ the\ correct\ answer\ is\ option\ (B)}$

Multiple choice reactions of haloarenes haloalkanes and haloarenes chemistry

The acid that cannot be prepared by Grignard reagent is.

  1. Acetic acid

  2. Formic acid

  3. Butyric acid

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

Formic acid (containing only one C atom) cannot be prepared by Grignard reagent. The acid that can be prepared by Grignard reagent should contain a minimum of two carbon atoms. An example is as shown below.
$\displaystyle CO _2+CH _3-MgI \rightarrow CH _3-COO-MgI \xrightarrow [hydrolysis]{H^+} CH _3-COOH+ Mg(I)OH$