Hydrogen

H₂S has minimum boiling point.

PbS + 4H₂O_2->PbSO₄ + 4H₂O.

Volume strength of H₂O₂ = Molarity * 11.2

HF molecules are associated with strong intermolecular hydrogen bonding hence its boiling point is the highest

PbS + 4H₂O₂->PbSO₄ + 4H₂O.

Volume strength of H₂O₂ = Molarity * 11.2

$\therefore Molarity=\frac{V}{11.2}=\frac{20}{11.2}=1.78\approx 1.8$

$l^{-}+H_2{O}_2+2H^{+}\to l_2+2H_{2}O$

(-1) oxidation (0)

Here, I is reducing agent

${}_{}$ $\therefore H_2{O}_2$  behaves like oxidizing agent

Tritium is radioactive and it decays into He³ during emission of b-radiation

Due to H- bond in water, it has high melting point and melting point of other hydrides of the group are depending upon the molecular weight.