Select the acid which contains four hydrogen atoms in it.
(a) Formic acid
(b) Sulphuric acid
(c) Nitric acid
(d) Acetic acid

Options

A. Formic acid
B. Sulphuric acid
C. Nitric acid
D. Acetic acid

Explanation

To solve the question of which acid contains four hydrogen atoms, we will analyze each option provided:

1. **Formic Acid**:
- The molecular formula for formic acid is HCOOH.
- Counting the hydrogen atoms: There are 2 hydrogen atoms.
- Conclusion: Formic acid does not contain four hydrogen atoms.

2. **Sulphuric Acid**:
- The molecular formula for sulphuric acid is H2SO4.
- Counting the hydrogen atoms: There are 2 hydrogen atoms.
- Conclusion: Sulphuric acid does not contain four hydrogen atoms.

3. **Nitric Acid**:
- The molecular formula for nitric acid is HNO3.
- Counting the hydrogen atoms: There is 1 hydrogen atom.
- Conclusion: Nitric acid does not contain four hydrogen atoms.

4. **Acetic Acid**:
- The molecular formula for acetic acid is CH3COOH.
- Counting the hydrogen atoms: There are 4 hydrogen atoms (3 from CH3 and 1 from COOH).
- Conclusion: Acetic acid contains four hydrogen atoms.

After analyzing all the options, we conclude that the correct answer is:

**Option D: Acetic Acid**