The intermolecular force in solid hydrogen is .........

Saline hydrides are known to react with water violently producing fire. Can $CO_2$,a well-known fire extinguisher,be used in this case? Explain.

Which property among the following is the same for both hydrogen and deuterium molecules?

$N_2H_4$ and $H_2O_2$ show similarity in

Among $CaH_2$,$NH_3$,$NaH$,and $B_2H_6$,which are covalent hydrides?

Hydrogen and deuterium differ in