The correct statements among the following are i. Saline hydrides produce $\mathrm{H}_2$ gas when reacted…
The correct statements among the following are
i. Saline hydrides produce $\mathrm{H}_2$ gas when reacted with water
ii. Presently $\sim 77 \%$ of the industrial dihydrogen is produced from coal
iii. Commercially marketed $\mathrm{H}_2 \mathrm{O}_2$ contains $3 \% \mathrm{H}_2 \mathrm{O}_2$
i, ii, iii
i, iii only
ii, iii only
i, ii only
Solution
(i) Saline hydrides like NaH react violently with water to librate hydrogen gas.
(ii) Presently $77 \%$ of the industrial dihydrogen is produced from petro-chemicals.
(iii) Commercially marketed sample is 10 V which contains $3 \% \mathrm{H}_2 \mathrm{O}_2$