Which of the following set of compounds have the same molecular formula?
a) Butane and isobutane
b) Cyclohexane and 1-hexene
c) Propanal and propanone
d) All the three

a) butane and isobutane

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a) isobutane n butane
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Butane and isobutane has the same molecular formula since isobutane is an isomer (has same formula) of butane.
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Option A)
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