Which of the following are correct structural isomers of butane?
A
(i) and (iii)
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B
(ii) and (iv)
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C
(i) and (ii)
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D
(iii) and (iv)
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Solution
The correct option is A (i) and (ii) (i) n−butane and (ii) iso−butane are structural isomer of butane.
(iii) and (iv) are cycloalkanes which have different molecular formulas and Hydrogen is making two bonds which is not possible therefore, these are not isomers of butane.