3SIDDHARTH i know dat it was wrong becos it was rong as per NCERT but i dont know y it is rong
can u explain
12 Answers
1Where did u find this reaction bro?? Nitromethane loses proton and when treated with alkali forms an acinitro compound which on treatment with sulphuric acid gives aldehyde. 
31presence of nitro on methyl group make the hydrogen on methane acidic. so they readily react with alkali to lose a proton..[1]
3yup u r rite this is the expn given by NCERT also
but the resonance structure shows dat nitrogen atom has gained a +ive charge and so the OH- ion can attack directly at the nitrogen atom wont The nitrogen atom behaves like a carbonyl carbon
1do consider chemical bondnig aspect da. you seem 2 b forgetting it everywhere.
1greater the e.n difference stronger the bond. so CN bond id much stronger than NO bond.
and anyways CH3- is a bad leaving group.