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.
