Which of the following compounds have highest melting point?

Only I

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Only II

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I and II

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II and III

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Solution

The correct option is B Only II
Compound $I I$ is most symmetrical because it has both $C H_{3}$ groups and $C l$ atoms $p -$ to each other. Therefore, it fits in the crystal lattice better than the other two isomers and hence it has high melting point.

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Similar questions

Which of the following process / processes release heat ?
(i) condensation (ii) vaporisation (iii) freezing (iv) melting

(a) only (i) (b) only (iv) (c) (i) and (iii) (d) (ii) and (iv)

I I I

2,

I I I I

3,

I I

1,

I I - I I I I + I I I + I I I I I =

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