In the following reaction,
$CH_3-C \equiv CH \xrightarrow[873 \ K]{\text{red hot iron tube}} A$
the number of sigma$(\sigma)$ bonds present in the product $A$ is

Which of the following is an $o-/p-$ directing group?

The product formed when acetylene is passed through a red-hot tube is:

Consider the following sequence of reactions. In $Z$,the number of $sp^3$ carbons is $a$ and $sp^2$ carbons is $b$. The value of $(a+b)$ is:
$CH_3CH_2CH_2CH_2Br$ $\xrightarrow[\text{dry ether}]{Na} X$ $\xrightarrow[\text{10-20 atm}]{\text{Cr}_2\text{O}_3 / 773 \text{ K}} Y$ $\xrightarrow[\text{anhy. AlCl}_3]{\text{CH}_3\text{COCl}} Z$

In the reaction $C_6H_5CH_3$ $\xrightarrow{\text{Oxidation}} A$ $\xrightarrow{NaOH} B$ $\xrightarrow{\text{Sodalime}} C$. Then $C$ is

Identify the final product $C$ in the following reaction sequence:
$1,3-\text{cyclohexadiene}$ $\xrightarrow{NBS} A$ $\xrightarrow{Aq. NaOH} B$ $\xrightarrow{Con. H_2SO_4, \Delta} C$