There is also a lone pair of electrons in nitrogen. It can donate this lone pair to the carbon, and it is possible to draw quite a few resonance... View Article
The actual electrophile in the reaction is the nitronium ion (NO2+) formed using concentrated nitric acid and concentrated sulfuric acid in situ... View Article
1) 0 2) 2 3) 1 4) -1 Answer: (3) 1 Solution: Given, A + B + C = 180° A + B = 180° - C Taking 'tan' on both sides, tan(A + B) = tan(180°... View Article
1) 4 sin A/2 sin B/2 sin C/2 2) 4 cos A/2 cos B/2 cos C/2 3) 4 cos A/2 sin B/2 sin C/2 4) 4 cos A/2 sin B/2 cos C/2 Answer: (2) 4 cos A/2 cos... View Article