Question

ASSERTION - Butane exhibits isomerism.
REASON - Butane is a saturated hydrocarbon

tick the correct answer .
A- BOTH ARE TRUE AND R IS THE CORRECT EXPLANATION
B -BOTH ARE TRUE BUT R IS NOT THE CORRECT EXPLANATION
C -A IS TRUE BUT R IS FALSE
D -A IS FALSE

Answer 1

Answer:

B) Both are true but reason is not the correct explanation

Answer 2

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

• Butane exhibits isomerism because butane has two structural isomers. In C4H10 one of the carbon atoms exhibits a straight-chain and another chain is branched.

• straight-chain formula

H H H H

| | | |

H--C--C--C--C--H

| | | |

H H H H

• Branched-chain formula

H H H

| | |

H--C--C--C--H

| | |

H | H

H ---C---H

|

H

• These isomers are called Butane and 2-Methylpropane.

• Butane is a gas derived from petroleum. Generally used in cigarette lighters.

• Isomers arise because of the probability of branching in carbon chains.