Hydrogen Test -...

When $$ NaBH_{4} $$ is dissolves in water

The hydride ion $$ H^{-} $$ is a stronger base than its hydroxide ion $$OH^{-} $$ . Which of the following reactions will occur if sodium hydride ($$NaH$$) is dissolved in water

In lab $$ H_{2}O_{2} $$ is prepared by 

Which of the following statements are correct?
(I) Both melting and boilling points of $$H_{2}O$$ are higher than those of $$H_{2} Te.$$
(II) In both $$N_{2}O_{5}$$ and $$N_{2}O_{4}$$ all $$N-O$$ bond lengths are equivalent.
(III) In both crystalline $$NaHCO_{3}$$ and $$KHCO_{3}$$, $$HCO_{3}^{-}$$ forms only dimeric anion through hydrogen bond.
(IV) Amongst $$B_{2}$$, $$C_{2}$$, $$N_{2}^{-}$$ and $$O_{2}$$, $$N_{2}^{-}$$ and $$ O_{2}$$ on further ionization (losing single electron)
thermodynamically more stable species is formed.

Pure hydrogen is obtained by carrying electrolysis of 

Lead pipes are not used for carrying drinking water because

Limiting compositions of f-block hydrides are

Plumbosolvency is a health hazard in the transportation of 

Which of the following melts in boiling water ?

Which of the following pair will not produce dihydrogen gas?