Chloroform,on warming with $Ag$ powder,gives:

$A$ $\xrightarrow[1\% \ HgSO_4]{20\% \ H_2SO_4} B$ $\xrightarrow{I_2 + NaOH} C + C_6H_5COONa$. The reactant $A$ is

The number of sigma $(\sigma)$ bonds in the molecule $CH_3-CH_2-CH_2-C \equiv CH$ is $......$

In the reaction $CaC_2 + H_2O \to A \xrightarrow{H_2SO_4/HgSO_4} B$,what are $A$ and $B$?

Acetylene reacts with a $42\% H_2SO_4$ solution containing $1\% HgSO_4$ to give

The correct order of acidity of the following compounds is

$I. CH_3-C \equiv CH$

$II. F_3C-C \equiv CH$

$III. CH_3-C \equiv C-CH_3$

$IV. CH_3-CH=CH-CH_3$