Which of the following organic compounds has the same hybridization as its combustion product $(CO_2)$?

The number and type of bonds between two carbon atoms in $CaC_2$ are

Which of the following metal carbides gives propyne on hydrolysis?

Acetylene gas when passed through $20\% \ H_2SO_4$ at $80 \, ^\circ C$ gives acetaldehyde. The catalyst required for this conversion is:

The colorless gas produced by the reaction of calcium carbide with water is.....

When propyne is treated with dilute $H_2SO_4$ and $HgSO_4$,the major product is