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Arrange the following in the decreasing ...

Arrange the following in the decreasing order of their melting points:
I. Decane II. Nonane
III. Octane IV. Heptane

A

(a) `(I) gt (II) gt (III) gt (IV)`

B

(b) `(IV) gt (III) gt (II) gt (I)`

C

(c) `(I) gt (III) gt (II) gt (IV)`

D

(d) `(IV) gt (II) gt (III) gt (I)`

Text Solution

Verified by Experts

The correct Answer is:
C
The melting point of even number of C atoms is greater than the next lower and next higher C atom (due to the altermation effect).
So, `C_(10) gt C_(8) gt C_(9) gt C_(7)`
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