Which of the following is not a isomer of pentane?

n-pentane

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2, 2-dimethyl-1-propane

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2, 3-dimethyl-1-butane

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2-methyl-1-butane

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Solution

The correct option is B 2, 3-dimethyl-1-butane
$C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H_{3} (C_{5} H_{12})$ is not a isomer of pentane because the number of carbon is different from the number of carbon in pentane.

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Which of the following is not a isomer of pentane?

The correct option is B 2, 3-dimethyl-1-butaneCH3−CH2−CH2−CH2−CH3(C5H12) is not a isomer of pentane because the number of carbon is different from the number of carbon in pentane.

The correct option is B 2, 3-dimethyl-1-butane
$C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H_{3} (C_{5} H_{12})$ is not a isomer of pentane because the number of carbon is different from the number of carbon in pentane.