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Arrange the following in decreasing orde...

Arrange the following in decreasing order of their boiling points.
(A). n-butane
(B). 2-methylbutane
(C). n-pentane
(D). 2,2-dimethylpropane

A

`A gt B gt C gt D`

B

`B gt C gt D gt A`

C

`D gt C gt B gtA`

D

`C gt B gt D gtA`

Text Solution

Verified by Experts

The correct Answer is:
D
Boiling point decreases with increase in branching and with decrease in total number of carbon atoms. Thus, the correct order is
`"C (n-pentane)" gt "B (2-methylbutane)" gt "D (2, 2- dimethylpropane)" gt "A (n-butane)"`.
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Knowledge Check

  • Arrange the following in the decreasing order of their boiling points: I.

    A
    (a) `(I) gt (III) gt (II) gt (IV)`
    B
    (b) `(I) gt (II) gt (III) gt (IV)`
    C
    (c) `(III) gt (IV) gt (II) gt (I)`
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  • Arrange the following in decreasing order of their boiling points . (A ) n- butane (B) 2 - methybultane (C ) n - petane (D ) 2 , 2 - dimethylpropane

    A
    `A gt B gt C gt D `
    B
    `B gt C gt D gt A `
    C
    `D gt C gt B gt A `
    D
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  • Arrange the following in decreasing order of their boiling points: (I) n-Butane (II) 2-Methylbutane, (III) n-Pentane (IV) 2,2-Dimethylpropane

    A
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