In sheets, the carbon atoms are tightly bound together. Since the bonds between the sheets are weak, under friction stress, graphite shows lower... View Article
Every carbon atom's outermost shell has four electrons. In diamonds, these electrons are exchanged to form very tight chemical bonds with four... View Article
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