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An organic compound having molecular mas...

An organic compound having molecular mass `60` is found to contain `C = 20%, H = 6.67%`, and `N = 46.67%`, while rest is oxygen. On heating, it gives `NH_(3)` along with a solid residue. The solid residue gives violet color with alkaline copper sulphate solution. The compounds is

A

`CH_NCO`

B

`CH_3CONH_2`

C

`(NH_2)_2CO`

D

`CH_3CH_2CONH_2`

Text Solution

Verified by Experts

The correct Answer is:
C
Given C = 20% , H = 6.67%, N = 46.67%
`:. O = 100 - (20 + 6.67 + 46.67)`
` = 26.66%`
Molar mass is 60

Empirical formula `= CH_4 N_2O`
Empirical mass = 60
`:.` Molecular formula is `CH_4N_2O`
`i.e. NH_2- C - NH_2` (urea)
Hence, `(NH_2)_2CO`.
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