Alcohols Phenols and Ethers Test

Result

Alcohols Phenols and Ethers Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

One mole of an organic compound 'A' with the formula C₃H₈O reacts completely with two moles of HI to form X and Y. When 'Y' is boiled with aqueous alkali forms Z. Z answers the iodoform test. The compound 'A' is ______.

A
Propan – 1 – o1

B
Propan – 2 – o1

C
ethoxyethane

D
methoxyethane

Solution

Ether react with HI to form alcohol and alkyl iodide. Alcohol on oxidation will give iodoform test.
Question 2
1 / -0

In alcohols, increase of branching in carbon chain results in boiling point

A
remains the same

B
increase

C
decrease

D
None of these

Solution

As the length of carbon chain increases, the surface area of the compound will also increase. Van der Waals dispersion force is proportional to the surface area. So the increase of surface are increases the ability of individual molecules to attract each other. Branching in molecules decreases the surface area thereby decreasing the attractive force between individual molecules. As a result, the boiling point decreases.
Question 3
1 / -0

Ketones are reduced to the corresponding alcohols by catalytic hydrogenation to form

A
primary alcohols

B
secondary alcohols

C
tertiary alcohols

D
None of these

Solution

Carboxylic acids, esters, and acid halides can be reduced to either aldehydes or a step further to primary alcohols, depending on the strength of the reducing agent; aldehydes and ketones can be reduced respectively to primary and secondary alcohols.
Question 4
1 / -0

The process of converting alkyl halides into alcohols involves _____________.

A
rearrangement reaction

B
addition reaction

C
dehydrohalogenation reaction

D
substitution reaction

Solution

Alkyl halides are converted into alcohols by substitution reaction. When alkyl halides are treated with aqueous KOH, alcohols are formed. This is a nucleophilic substitution reaction.