Acetylene shows ........... in its reaction with silver nitrate.

An inorganic metal oxide $(A)$ heated with carbon gives compound $(B)$,which on reaction with water gives ethyne. What are the compounds $(A)$ and $(B)$?

$CH \equiv CH$ reacts with acetic acid in the presence of $Hg^{2+}$ to give

Predict the product $C$ obtained in the following reaction of $1-$butyne: $CH_3-CH_2-C \equiv CH + HCl$ $\rightarrow B$ $\xrightarrow{HI} C$

What is obtained when calcium carbide reacts with heavy water?

$A$ mixture of methane,ethylene,and acetylene gases is passed through a Wolf's bottle containing ammoniacal cuprous chloride. The gas coming out is