By heating a mixture of $CHCl_3$ with silver powder,the compound formed is

Which of the following compounds is capable of reacting with ammoniacal $AgNO_3$ solution?

$Ca + C$ $\xrightarrow[\Delta ]{} A$ $\xrightarrow{H_2O} B$ $\xrightarrow{\text{cyclic polymerisation}} C$
Product $B$ and $C$ are respectively

Which is the most acidic of the following?

Which of the following compounds does not release $CO_2$ on oxidative ozonolysis?

Identify the alkyne formed by the reaction of calcium carbide with water.