Oxidation number of H in NaH, CaH$_2$, and LiH, respectively is:

Question

Two gases A and B are filled at the same pressure in separate cylinders with movable pistons of radii $r_A$ and $r_B$ respectively. On supplying an equal amount of heat to both the cylinders, their pressures remain constant and their pistons are displaced by 16 cm and 9 cm respectively. If the change in their internal energies is the same, then the ratio $r_A / r_B$ is:

Answer 1

1. Oxidation State Determination for NaH (Sodium Hydride)
Sodium ($Na$), an alkali metal, consistently exhibits an oxidation state of $+1$.
For the neutral compound NaH, hydrogen's oxidation state must be $-1$ to achieve charge neutrality. 2. Oxidation State Determination for CaH$_2$ (Calcium Hydride)
Calcium ($Ca$), an alkaline earth metal, has an oxidation state of $+2$.
As CaH$_2$ is a neutral species, hydrogen's oxidation state must be $-1$ to balance the charge.3. Oxidation State Determination for LiH (Lithium Hydride)
Lithium ($Li$), an alkali metal, possesses an oxidation state of $+1$.
In the neutral compound LiH, hydrogen's oxidation state is determined to be $-1$ for charge balance.Conclusion: The determined oxidation states for hydrogen in NaH, CaH$_2$, and LiH are $-1$, $-1$, and $-1$, respectively. This corresponds to Option (d) $-1, -1, -1$.

Oxidation number of H in NaH, CaH$_2$, and LiH, respectively is:

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The Correct Option is D

Solution and Explanation

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