The compounds that will give an isomer of 2,2 | vedclass

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(C) $2,2$-dimethylpropane (neopentane) has the molecular formula $C_5H_{12}$. Isomers of $C_5H_{12}$ are $n$-pentane,isopentane ($2$-methylbutane),and

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$1$ and $3$

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(C) $2,2$-dimethylpropane (neopentane) has the molecular formula $C_5H_{12}$. Isomers of $C_5H_{12}$ are $n$-pentane,isopentane ($2$-methylbutane),and neopentane ($2,2$-dimethylpropane). $(1)$ $CH_3-CH=C(CH_3)_2$ ($2$-methylbut-$2$-ene) has the formula $C_5H_{10}$. On catalytic hydrogenation,it gives $2$-methylbutane $(C_5H_{12})$,which is an isomer of $2,2$-dimethylpropane. $(2)$ $CH_3-CH=CH-CH_3$ (but-$2$-ene) has the formula $C_4H_8$. On hydrogenation,it gives butane $(C_4H_{10})$,which is not an isomer of $C_5H_{12}$. $(3)$ $CH_3-CH=CH-CH_2-CH_3$ (pent-$2$-ene) has the formula $C_5H_{10}$. On catalytic hydrogenation,it gives $n$-pentane $(C_5H_{12})$,which is an isomer of $2,2$-dimethylpropane. $(4)$ $CH_3-C(CH_3)=C(CH_3)-CH_3$ ($2,3$-dimethylbut-$2$-ene) has the formula $C_6H_{12}$. On hydrogenation,it gives $2,3$-dimethylbutane $(C_6H_{14})$,which is not an isomer of $C_5H_{12}$. Thus,compounds $(1)$ and $(3)$ yield isomers of $2,2$-dimethylpropane.

The compounds that will give an isomer of $2,2$-dimethylpropane on catalytic hydrogenation are:
$(1)$ $CH_3-CH=C(CH_3)_2$
$(2)$ $CH_3-CH=CH-CH_3$
$(3)$ $CH_3-CH=CH-CH_2-CH_3$
$(4)$ $CH_3-C(CH_3)=C(CH_3)-CH_3$

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The compounds that will give an isomer of $2,2$-dimethylpropane on catalytic hydrogenation are: $(1)$ $CH_3-CH=C(CH_3)_2$ $(2)$ $CH_3-CH=CH-CH_3$ $(3)$ $CH_3-CH=CH-CH_2-CH_3$ $(4)$ $CH_3-C(CH_3)=C(CH_3)-CH_3$