Among the open-chain ethers of formula $C X_{5} H X_{12} O$ , how many contain at least one branched alkyl group (isopropyl, sec-butyl, isobutyl or tert-butyl; structural isomers only)?

Answer: D

The six ethers are 1-methoxybutane, 2-methoxybutane, 1-methoxy-2-methylpropane, 2-methoxy-2-methylpropane, 1-ethoxypropane and 2-ethoxypropane. All contain a branched group except 1-methoxybutane and 1-ethoxypropane, so 4.

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Among the open-chain ethers of formula CX5​HX12​O, how many contain at least one branched alkyl group (isopropyl, sec-butyl, isobutyl or tert-butyl; structural isomers only)?

Answer: D

More questions on Counting structural isomers

Among the open-chain ethers of formula $C X_{5} H X_{12} O$ , how many contain at least one branched alkyl group (isopropyl, sec-butyl, isobutyl or tert-butyl; structural isomers only)?