The major organic compound formed by the reaction of $1, 1, 1-$trichloroethane with silver powder is:

In order to complete the reaction $1-Pentyne$ $\xrightarrow{a} 4-Octyne$ $\xrightarrow{b} cis-4-Octene$,$a$ and $b$ will be:
$A) NaNH_2; CH_3CH_2CH_2Br : H_2, (1 \ mole) \text{ Lindlar catalyst}$
$B) NaNH_2; CH_3CH_2CH_2Br : H_2, (2 \ moles) \text{ Pd or Ni}$
$C) NaNH_2; CH_3CH_2CH_2Br : H_2, (1 \ mole) \text{ Pd or Ni}$
$D) NaNH_2; CH_3CH_2CH_2Br : BH_3, H_2O_2, OH^-$

Explain the acidic nature of ethyne.

Which of the following has acidic hydrogen?

$C_2H_5-C \equiv C-C_2H_5$ $\xrightarrow{Na/liq. NH_3} (A)$ $\xrightarrow{Br_2/CCl_4} (B)$
Which statement is correct regarding product $(B)$?

The two carbon atoms in acetylene are