PUC Karnataka Science Class 12Department of Pre-University Education, Karnataka
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Arrange in order of increasing boiling points 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane - PUC Karnataka Science Class 12 - Chemistry

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Question

Arrange each set of compounds in order of increasing boiling points.

1-Chloropropane, Isopropyl chloride, 1-Chlorobutane.

Solution 1

For alkyl halides containing the same halide, the boiling point increases with an increase in the size of the alkyl group. Thus, the boiling point of 1-chlorobutane is higher than that of isopropyl chloride and 1-chloropropane.

Further, the boiling point decreases with an increase in branching in the chain. Thus, the boiling point of isopropyl alcohol is lower than that of 1-chloropropane.

Hence, the given set of compounds can be arranged in the increasing order of their boiling points as:

Isopropyl chloride < 1-Chloropropane < 1-Chlorobutane

Solution 2

Isopropyl chloride < 1 – Chloropropane < 1 – Chlorobutane

Reason :

(a)For same halogen, B.Pt. increases as size of alkyl group increases.

(b)B.Pt. decreases as branching increases.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Chemistry Textbook for Class 12 (2018 to Current)
Chapter 10: Haloalkanes and Haloarenes
Q: 6.2 | Page no. 291
Solution Arrange in order of increasing boiling points 1-Chloropropane, Isopropyl chloride, 1-Chlorobutane Concept: Physical Properties of Haloalkanes and Haloarenes.
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