Question

Which of the following statement about hydrogen is/are incorrect?

• A. Hydrogen does not acts as cation in ionic salts
• B. Dihydrogen does not act as a reducing agent
• C. Hydrogen has three isotopes of which tritium is the most common
• D. Both (b) and (c)

Answer 1

The correct option is D Both (b) and (c)

Hydrogen exist as a hydride $H^{-}$ in ionic salt.
Most abundant form of hydrogen is protium.
Dihydrogen reduces some metal ions in aqueous solution and oxides of metals (less active than iron) into corresponding metals.
$H_2\left(g\right)+P{d}^{2+}\left(aq\right)⟶Pd\left(s\right)+2H^{+}\left(aq\right)y{H}_2\left(g\right)+M_x{O}_y\left(s\right)⟶xM\left(s\right)+y{H}_{2}O\left(l\right)$
Hence, option (d) is correct.