Physical Properties of Alcohols

Author:K L Chugh
12th West Bengal Board
IMPORTANT

Important Questions on Physical Properties of Alcohols

EASY
IMPORTANT

Give the IUPAC names of the following compounds

CH2=CH-OCH3

MEDIUM
IMPORTANT

Boiling points of alcohols are _____ than those of the corresponding alkanes.(less/more)

EASY
IMPORTANT

What is an enzyme? Name two enzymes used in the preparation of alcohol from sucrose.

MEDIUM
IMPORTANT

Arrange the compounds A to D which have roughly the same molecular weight in order of decreasing boiling points.
(A) CH3CH2CH(OH)CH2CH2CH3
(B) CH3CH25CH3
(C) CH3CH2COHCH32
(D) CH3CH25OH

EASY
IMPORTANT

Why ethanol has higher boiling point than C2H5Br

MEDIUM
IMPORTANT

Why glycerol is more viscous than glycol?

MEDIUM
IMPORTANT

Which out of the following has the highest boiling point?
(i) C2H5OH
(ii) C2H5Br
(iii) CH3OH
(iv) C3H6
(v) CH3OCH3

MEDIUM
IMPORTANT

Arrange the following in the increasing order of boiling point

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MEDIUM
IMPORTANT

Arrange propan-1-ol, propan-2-ol and methoxyethane in the increasing order of their boiling points.

MEDIUM
IMPORTANT

How would you account for the following:

The boiling points of ethers are much lower than those of the alcohols of comparable molar mass.

MEDIUM
IMPORTANT

Account for the following :

The boiling points of ethers are lower than isomeric alcohols.

MEDIUM
IMPORTANT

Account for the following :

The boiling point of ethanol is higher than that of methanol

EASY
IMPORTANT

Account for the following :

Propanol has higher boiling point than butane.

EASY
IMPORTANT

How is that alcohol and water are miscible in all proportions?

EASY
IMPORTANT

Phenol has smaller dipole moment than methanol. Why?

EASY
IMPORTANT

Which of the following will have higher boiling point and why? CH3NH2 or CH3OH

MEDIUM
IMPORTANT

Why absolute ethyl alcohol cannot be obtained by simple fractional distillation of a mixture of alcohol and water?

MEDIUM
IMPORTANT

Alcohols are comparatively more soluble than the hydrocarbons of comparable molecular masses. Explain.