91Ó°ÊÓ

Metal hydride on treatment with water gives (a) hydrogen (b) acid (c) \(\mathrm{H}_{2} \mathrm{O}\) (d) \(\mathrm{H}_{2} \mathrm{O}_{2}\)

Hydrogen from HCl can be prepared by (a) \(\mathrm{P}\) (b) \(\mathrm{Mg}\) (c) \(\mathrm{Hg}\) (d) \(\mathrm{Cu}\)

Hydrogen will not reduce (a) heated cupric oxide (b) heated ferric oxide (c) heated stannic oxide (d) heated aluminium oxide

Reaction of potassium with water is a) hydrolysis (b) absorption c) exothermic (d) endothermic

Which gas is liberated, when alkaline formaldehyde olution is treated with \(\mathrm{H}_{2} \mathrm{O}_{2}\) ? a) \(\mathrm{CH}_{4}\) (b) \(\mathrm{H}_{2}\) c) \(\mathrm{CO}_{2}\) (d) \(\mathrm{O}_{2}\)

Hydrogen burns in air or oxygen with (a) invisible pale blue flame (b) red flame (c) golden flame (d) blue flame

Speed of decomposition of \(\mathrm{H}_{2} \mathrm{O}_{2}\) is reduced by (a) \(\mathrm{Pt}\) (b) alcohol (c) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) (d) \(\mathrm{NaOH}\)

Which of the following cannot be oxidized by \(\mathrm{H}_{2} \mathrm{O}_{2} ?\) (a) \(\mathrm{O}_{3}\) (b) \(\mathrm{PbS}\) (c) \(\mathrm{Na}_{2} \mathrm{SO}_{3}\) (d) \(\mathrm{Kl}+\mathrm{HCl}\)

Which of the following is a true peroxide? (a) \(\mathrm{SO}_{2}\) (b) \(\mathrm{BaO}_{2}\) (c) \(\mathrm{NO}_{2}\) (d) \(\mathrm{MnO}_{2}\)

There are three isotopes of hydrogen and three naturally occurring isotopes of oxygen \(\left(\mathrm{O}^{16}, \mathrm{O}^{17}\right.\) and \(\mathrm{O}^{18}\) ). How many kinds of water are possible? (a) 9 (b) 16 (c) 8 (d) 18