$H_2S$ reacts with $O_2$ to form:

Dihydrogen reacts with $CuO$ to give:

With which of the following does hydrogen combine directly?

Which of the following is an example of an interstitial hydride?

What is the nature of the nuclear spin in para-hydrogen?

Identify the correct statements about the hydrides.
$(I)$ In saline hydrides,the oxidation state of hydrogen is $-1$.
$(II)$ $LaH_{2.87}$ is an example of an interstitial hydride.
$(III)$ $NH_3$ and $H_2O$ have the tendency to form hydrogen bonds.
$(IV)$ Electrolysis of molten sodium hydride liberates $H_2$ gas at the anode.