A compound with molecular formula `C_(4)H_(10)O_(3)` is converted by the action of acetyl chloride to a compound with molecular weight 190. The original compound has `:`

Answer

2

Explanation

`-OH overset(+ CH_3COO^-)underset(-H^+) rarr - OCOCH_3`
One- OH group on acylation bring about a change in molecular mass = 42
Molecular mass of `C_4H_(10)O_(3)`
`= 4 xx 12 + 10 xx 1 + 3 xx 16 = 106`
Actual increase in molecular mass = 190 - 106 = 84
`therefore` Number of -OH groups `= (84)/(42) = 2`.