Question

Which of the organic products of the following reactions has the least boiling point?

A

B

C

D

Hard

Solution

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Correct option is B)

In option A, the product formed is the primary alcohol because reduces the carbonyl bond only.


The organic product of the reaction of option (B) has the least boiling point.
In reaction of option (B), a secondary alcohol is obtained. In all the remaining reactions, a primary alcohol is obtained.
The boiling point of alcohol decreases with increase in branching. Thus, propanal has lower boiling point than propanal.

(C)


In option D, the product formed is the primary alcohol because hydroboration of terminal alkene forms primary alkene the carbonyl bond only.



Boiling point order of alcohols are-

Primary > secondary > Tertiary alcohols

Option B is correct

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