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Standard XII
Chemistry
State (Phase) of Alkanes
Question

Which one of the following is expected to have minimum boiling point?
  1. n-Butane
  2. n-Pentane
  3. 2-Methylbutane
  4. 2,2 - Dimethylpropane

A
n-Butane
B
n-Pentane
C
2-Methylbutane
D
2,2 - Dimethylpropane
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Solution
Verified by Toppr

The correct option is A n-Butane
The boiling point is directly proportional to molecular mass. So n-butane among given will have a minimum boiling point.

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Similar Questions
Q1
Arrange the following in decreasing order of their boiling points.
(I) n-Butane
(II) 2-Methylbutane
(III) n-Pentane
(IV) 2,2-Dimethylpropane
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Q2
Assertion :Boiling point of pentane is higher than 2,2-dimethylpropane. Reason: There is steady increase in boiling point with increase in molecular mass.
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Q3
Which one of the following is expected to have minimum boiling point?
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Q4

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(i) 2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane

(ii) 1-Bromo-3-methylbutane, 2-Bromo-2-methylbutane, 3-Bromo-2- methylbutane

(iii) 1-Bromobutane, 1-Bromo-2,2-dimethylpropane, 1-Bromo-2-methylbutane, 1-Bromo-3-methylbutane.

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Q5

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