IIT-JEE Exam

A compound with molecular mass 180 is acylated
with CH3COCl to get a compound with molecular
mass 390. The number of amino groups present
per molecule of the former compound is -
(1) 4 (2) 6 (3) 2 (4) 5

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IIT-JEE Other Question

Compound (A), C8H9Br, gives a white precipitate
when warmed with alcoholic AgNO3. Oxidation
of (A) gives an acid (B), C8H6O4. (B) easily forms
anhydride on heating. Identify the compound (A). Which one of the following molecules is expected
to exhibit diamagnetic behaviour ?
(1) O2 (2) S2 (3) C2 (4) N2