Which of the following statement (s) is/are correct (A) $\mathrm{NaH}$ is non-volatile hydride (B)…
Which of the following statement (s) is/are correct
(A) $\mathrm{NaH}$ is non-volatile hydride
(B) $\mathrm{MgH}_2$ is polymeric hydride
(C) $\mathrm{NH}_3$ is an electron precise hydride
(D) $\mathrm{H}_2 \mathrm{O}$ is an electron rich hydride
A, B \& D only
A, B \& C only
B only
C \& D only
Solution
$\mathrm{NH}_3$ is an electron-rich hydride as $\mathrm{N}$-atom has a lone pair on it.
Thus, (C) is incorrect.
$\mathrm{NaH}$ being an ionic hydride is non-volatile.
Thus, (A) is correct.
$\mathrm{MgH}_2$ is a polymeric hydride due to bridging hydrogens.
Thus, (B) is also correct. .
$\mathrm{H}_2 \mathrm{O}$ is an electron-rich hydride due to presence of lone pairs of electrons on $\mathrm{O}$-atom.
Thus, (D) is correct.
