Identify the molecules which have sp-hybridis | vedclass

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(D) carbon atom is $sp$-hybridised if it is bonded to two other atoms with two $\pi$-bonds (e.g.,$C \equiv C$ or $C=C=C$ central carbon).Let's analyze

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$I, III, IV$ only

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(D) carbon atom is $sp$-hybridised if it is bonded to two other atoms with two $\pi$-bonds (e.g.,$C \equiv C$ or $C=C=C$ central carbon).Let's analyze each molecule:$I$. Ethane nitrile $(CH_3-C \equiv N)$: The carbon in the cyano group $(-C \equiv N)$ is $sp$-hybridised.$II$. Buta$-1,3-$diene $(CH_2=CH-CH=CH_2)$: All carbons are $sp^2$-hybridised.$III$. Propan$-1,2-$diene $(CH_2=C=CH_2)$: The central carbon is $sp$-hybridised because it forms two double bonds.$IV$. Ethyne $(HC \equiv CH)$: Both carbons are $sp$-hybridised.$V$. Benzene $(C_6H_6)$: All carbons are $sp^2$-hybridised.Thus,molecules $I, III,$ and $IV$ contain $sp$-hybridised carbons.

Identify the molecules which have $sp$-hybridised carbon$(s)$ from the list given below:
$I$. Ethane nitrile $(CH_3CN)$
$II$. Buta$-1,3-$diene $(CH_2=CH-CH=CH_2)$
$III$. Propan$-1,2-$diene $(CH_2=C=CH_2)$
$IV$. Ethyne $(HC \equiv CH)$
$V$. Benzene $(C_6H_6)$

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Among $[I_3]^{+}$,$[SiO_4]^{4-}$,$SO_2Cl_2$,$XeF_2$,$SF_4$,$ClF_3$,$Ni(CO)_4$,$XeO_2F_2$,$[PtCl_4]^{2-}$,$XeF_4$,and $SOCl_2$,the total number of species having $sp^3$ hybridised central atom is. . . . .

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Identify the molecules which have $sp$-hybridised carbon$(s)$ from the list given below:$I$. Ethane nitrile $(CH_3CN)$$II$. Buta$-1,3-$diene $(CH_2=CH-CH=CH_2)$$III$. Propan$-1,2-$diene $(CH_2=C=CH_2)$$IV$. Ethyne $(HC \equiv CH)$$V$. Benzene $(C_6H_6)$