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MCQS

Sindh MDCAT 2023

Q-119

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<p>Which of the following are the isomers of pentane?</p>

Chemistry

Miscellaneous

Question 119 of 200

Multiple Choice

n-pentane, 2-methyl butane, 2,2-dimethylpropane

58.96%

Explanation:

Pentane has 3 isomers which are as follows;

CH3-CH2-CH2-CH2-CH3 (n-pentane)

CH3-CH(CH3)-CH2-CH3 (2-methyl butane)

CH3-C(CH3)2-CH3 (2,2-Dimethylpropane)

Hence, option A is correct.

n-pentane, 2-methyl butane, 2,3-dimethyl butane

13.59%

Explanation:

Pentane has 3 isomers which are as follows;

CH3-CH2-CH2-CH2-CH3 (n-pentane)

CH3-CH(CH3)-CH2-CH3 (2-methyl butane)

CH3-C(CH3)2-CH3 (2,2-Dimethylpropane)

Hence, option A is correct.

n-pentane, 3-methyl butane, 2,2-dimethylpentane

12.96%

Explanation:

Pentane has 3 isomers which are as follows;

CH3-CH2-CH2-CH2-CH3 (n-pentane)

CH3-CH(CH3)-CH2-CH3 (2-methyl butane)

CH3-C(CH3)2-CH3 (2,2-Dimethylpropane)

Hence, option A is correct.

n-pentane, 2-methyl pentane, 2,2-dimethyl propane

14.48%

Explanation:

Pentane has 3 isomers which are as follows;

CH3-CH2-CH2-CH2-CH3 (n-pentane)

CH3-CH(CH3)-CH2-CH3 (2-methyl butane)

CH3-C(CH3)2-CH3 (2,2-Dimethylpropane)

Hence, option A is correct.

Explanation

Pentane has 3 isomers which are as follows;

CH3-CH2-CH2-CH2-CH3 (n-pentane)

CH3-CH(CH3)-CH2-CH3 (2-methyl butane)

CH3-C(CH3)2-CH3 (2,2-Dimethylpropane)

Hence, option A is correct.