COMSATS Entry Test: Chemistry MCQs with Answers

Question 1

What is the compressibility factor for an ideal gas?

Accepted Answer

1

Answer

0

Answer

2

Answer

-1

Question 2

The energy of an electron in the 2nd orbit of He+ is

Accepted Answer

-27.2 eV

Answer

-13.6 eV

Answer

-6.8 eV

Answer

-54.4 eV

Question 3

The rate constant for a reaction is 0.01 M-1s-1. The order of the reaction is

Accepted Answer

2

Answer

1

Answer

0

Answer

3

Question 4

What is the hybridization of NH3?

Accepted Answer

sp3

Answer

sp2

Answer

sp

Answer

dsp2

Question 5

The reaction of alcohols with SOCl2 gives

Accepted Answer

Alkyl halides

Answer

Alkenes

Answer

Alkynes

Answer

Alkanes

Question 6

The most stable carbocation among the following is

Accepted Answer

Tertiary butyl carbocation

Answer

Secondary butyl carbocation

Answer

Primary butyl carbocation

Answer

Methyl carbocation

Question 7

Williamson's synthesis is used to prepare

Accepted Answer

Ethers

Answer

Alcohols

Answer

Aldehydes

Answer

Ketones

Question 8

The compound that is used as an antiseptic is

Accepted Answer

Phenol

Answer

Ethanol

Answer

Diethyl ether

Answer

Glycerol

Question 9

The dehydration of alcohols gives

Accepted Answer

Alkenes

Answer

Alkanes

Answer

Alkynes

Answer

Alkyl halides

Question 10

The reaction of alcohols with PBr3 gives

Accepted Answer

Alkyl bromides

Answer

Alkenes

Answer

Alkynes

Answer

Alkanes

Question 11

The compound that is used as a solvent is

Accepted Answer

Diethyl ether

Answer

Phenol

Answer

Ethanol

Answer

Glycerol

Question 12

The boiling point of alcohols is higher than that of corresponding alkanes due to

Accepted Answer

Hydrogen bonding

Answer

Van der Waals forces

Answer

Dipole-dipole interactions

Answer

Ionic interactions

Question 13

The compound that is most acidic among the given options is

Accepted Answer

o-Nitrophenol

Answer

Phenol

Answer

m-Nitrophenol

Answer

p-Nitrophenol

Question 14

The order of boiling points of the following is: CH3CH2CH2OH, CH3CH2OCH3, CH3CH2CH3

Accepted Answer

CH3CH2CH2OH > CH3CH2OCH3 > CH3CH2CH3

Answer

CH3CH2CH3 > CH3CH2OCH3 > CH3CH2CH2OH

Answer

CH3CH2OCH3 > CH3CH2CH2OH > CH3CH2CH3

Answer

CH3CH2CH2OH > CH3CH2CH3 > CH3CH2OCH3

Question 15

The reaction of phenol with CH3COCl gives

Accepted Answer

Phenyl acetate

Answer

Acetophenone

Answer

Benzaldehyde

Answer

Benzoic acid