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Arrange the following in the increasing ...

Arrange the following in the increasing order of melting points
(a)`NH_3`, (b)`CH_3NH_2` , (c )`(CH_3)_2NH` , (d)`(CH_3)_3N`

A

`a lt bltc lt d`

B

`dlt cltb lt a`

C

`a lt dltc lt b`

D

None of these.

Text Solution

Verified by Experts

The correct Answer is:
B
M.pt. of `NH_3CH_3NH_2, (CH_3)_2NH, (CH_3)N` are `-77.7^@ C , -92^@ C, -96^@ C and -117^@ C`.The reason is H-bonding which is maximum in `NH_3` and there is no H-bonding in trimethylamine
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DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Ultimate Preparatory Package
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