The reagents $A$ and $B$ in the above reaction are:

The formation of an innumerable number of carbon compounds is due to its:

Identify the reagents used for the following conversion in the correct order.

For the following compounds,write structural formulas and $IUPAC$ names for all possible isomers having the number of double or triple bonds as indicated:
$(a)$ $C_4H_8$ (one double bond)
$(b)$ $C_5H_8$ (one triple bond)

Match the four starting materials $(P, Q, R, S)$ given in List-$I$ with the corresponding reaction schemes $(I, II, III, IV)$ provided in List-$II$ and select the correct answer using the code given below the lists. Codes: $P \quad Q \quad R \quad S$

What is the number of moles of $H$ atoms required for the complete reduction of one mole of acetonitrile?