Acetylene does not react with .....

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(C) Acetylene $(HC \equiv CH)$ is a terminal alkyne with acidic hydrogen atoms attached to $sp$-hybridized carbon atoms.$1$. It reacts with $Na$ to fo

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$NaOH$

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(C) Acetylene $(HC \equiv CH)$ is a terminal alkyne with acidic hydrogen atoms attached to $sp$-hybridized carbon atoms.$1$. It reacts with $Na$ to form sodium acetylide $(NaC \equiv CNa)$ and releases $H_2$ gas.$2$. It reacts with ammoniacal $AgNO_3$ (Tollens' reagent) to form a white precipitate of silver acetylide $(AgC \equiv CAg)$.$3$. It reacts with $HCl$ via electrophilic addition to form vinyl chloride and eventually ethylidene chloride.$4$. Acetylene is a very weak acid $(pK_a \approx 25)$ and does not react with a strong base like $NaOH$ ($pK_a$ of water is $15.7$) to form a salt,as the equilibrium lies far to the left.

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