Which of the following reactants exhibits aci | vedclass

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(A) The acidity of hydrocarbons depends on the hybridization of the carbon atom attached to the hydrogen. Terminal alkynes like $CH_3 - C\equiv CH$ ha

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$CH_3 - C\equiv CH$

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(A) The acidity of hydrocarbons depends on the hybridization of the carbon atom attached to the hydrogen. Terminal alkynes like $CH_3 - C\equiv CH$ have a terminal hydrogen atom attached to an $sp$-hybridized carbon. Due to the high $s$-character $(50\%)$ in $sp$-hybridized orbitals,the electrons are held more tightly by the nucleus,making the $C-H$ bond polar and the hydrogen atom acidic. Other options like alkanes $(sp^3)$ and alkenes $(sp^2)$ have lower $s$-character and are not acidic enough to react with bases like $NaNH_2$ or $Cu_2Cl_2$.

Which of the following reactants exhibits acidic properties?

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Which of the following reagents is most suitable to distinguish compound $(3)$ from the others?
$(1) \ CH_3-C \equiv C-CH_3$
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$(3) \ CH_3CH_2C \equiv CH$
$(4) \ CH_3CH=CH_2$

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