The decreasing order of melting points of the following compounds is:

(I) > (II) > (III) > (IV)

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(IV) > (III) > (II) > (I)

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(II) > (I) > (IV) > (III)

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(III) > (IV) > (I) > (II)

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Solution

The correct option is A (I) > (II) > (III) > (IV)
For alkanes, melting point increases as molecular weight increases due to increase in Van der Waal's forces of attractions.

However, Cycloalkanes, due to their compact nature, have high boiling and melting points than the corresponding alkanes.

Hence, the correct option is $A$

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Similar questions

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

H e

N e

A r

K r

(i) H C O O H (i i) P h - C O O H (i i i) P h - O H

(i v) C H_{3} C O O H

I . B a C l_{2}

II . S r C l_{2}

III . C a C l_{2}

IV . M g C l_{2}

V . B e C l_{2}

P h O^{⊖}

C H_{3} S^{⊖}

⊖ O H

M e O^{⊖}

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