M/J 2018/P12/Q36
Which diagram shows a branched-chain isomer of butane?
Answer: A
Explaination
Isomers are compounds that have same molecular formula (same number of atoms) but different structural formula.
Butane molecular formula: C4H10 ( CnH2n+2 )
So, option A is an isomer of butane and its name is 2-methyl propane/ iso butane.
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