Saturday, October 3, 2009

IIT JEE Chemistry Final Revision Set 19

1. When phenol is reacted with CHCl3 and NaOH followed by acidification, salicylaldehyde is obtained. Give the intermediate reactions.

2. A scarlet compound A is treated with con. HNO3 to give a chocolate brown precipitate B. Can you identify A? The precipitate B on warming with con. HNO3 in the presence of Mn(NO3)2 produces a pink-coloured solution due to the formation of C. Can you identify C.

3. Write down the structures of the stereoisomers formed when cis-2-butene is reacted with bromine.

4. There are _________ pi bonds in a nitrogen molecule.

5. The compound prepared by the action of magnesium on dry ethyl bromide in ether is known as _________ reagent.

JEE screening 1982
JEE 1995

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