Find out the incorrect order of bond angles

Options

A.
B. `CH_4 gt NH_3gt H_2O`
C. `H_2O gt H_2S gt H_2Se`
D. `NH_3lt PH_3lt AsH_3`

Answer

To solve the question of finding the incorrect order of bond angles among the given compounds, we will analyze the molecular structures and the factors affecting bond angles step by step.

### Step 1: Analyze the first set of compounds (NO2, NO2+, NO2-)

1. **NO2 (Nitrogen Dioxide)**: The structure is bent due to the presence of a lone electron (free radical) on nitrogen, leading to bond angle < 120°.
2. **NO2+ (Nitronium Ion)**: This ion has a linear structure because it has no lone pairs on nitrogen, resulting in a bond angle of 180°.
3. **NO2- (Nitrite Ion)**: This ion has one lone pair on nitrogen, which causes the bond angle to decrease further, typically around 115°.

**Order of bond angles**: NO2+ > NO2 > NO2-