(i) Draw the gas phase and solid phase structure of `H_(2)O_(2)`.
(ii) `H_(2)O_(2)` is a better oxidising agnet than water . Explain .

Answer

N/a

Explanation

(i) `H_(2)O_(2)` has a non-planar structure. The molecular dimensions in the gas phase and solid phase are given below.

(a)`H_(2)O_(2)` structure in gas phase, dihedral angle s `111.5^(@)`.
(b) `H_(2)O_(2)` structure in solid phase at 110K, discussed below.
(ii) `H_(2)O_(2)` is better oxiding agent than water as discussed below.
(a) `H_(2)O_(2)` oxidises an acidified solution of KI to given `I_(2)` which gives blue colour with starch solution but `H_(2)O` does not.
`2KI +H_(2)SO_(4) +H_(2)O_(2)`
`K_(2)SO_(4) + 2H_(2)O + I_(2)`
(b) `H_(2)O_(2)` turns balck PbS to white `PbSO_(4)` but `H_(2)O` does not.
`PdS+ 4H_(2)O_(2) to PbSO_(4) + 4H_(2)O`