The IUPAC name of compound $C H_{2} = C H - C H (C H_{3})_{2}$ is:

1, 1-dimethyl-2-propane

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2-vinyl propene

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3-methyl-1-butene

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2-vinyl propane

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Solution

The correct option is C 3-methyl-1-butene
The IUPAC name of $C H_{2} = C H C H (C H_{3})_{2}$ is $3 - m e t h y l - 1 - b u t e n e$ . The numbering is started from the end which gives the lowest locants to doubly bonded C atoms.
Hence, the option (C) is the correct answer.

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C H_{2} = C H - C H (C H_{3})_{2}

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