Question

Which molecule contains the smallest number of hydrogen atoms? A) N2H4. B) Al(OH) 3. C) (NH4) 2SO4. D) NH4NO3.

Answer 1

The molecule that contains the fewest number of Hydrogen atoms would be B. Al(OH)3. It only has 3 Hydrogen atoms.

Answer 2

Answer: Option (B) is the correct answer.

Explanation:

In a molecule of $N_{2}H_{4}$, there are 2 nitrogen atoms and 4 hydrogen atoms.  

In a molecule of $Al(OH)_{3}$, there are one aluminium atom, three oxygen atoms, and three hydrogen atoms.

In a molecule of $(NH_{4})_{2}SO_{4}$, there are 2 nitrogen atoms, 8 hydrogen atoms, one sulfur atom and 4 oxygen atoms.

In a molecule of $NH_{4}NO_{3}$, there are 2 nitrogen atoms, 4 hydrogen atoms and 3 oxygen atoms.  

Therefore, we can conclude that out of the given options $Al(OH)_{3}$ is the molecule which contains the smallest number of hydrogen atoms.