When $but-1-ene$ is mixed with an excess of bromine,the expected reaction product is:

Compound$(s)$ that on hydrogenation produce$(s)$ optically inactive compound$(s)$ is (are)

The metal used for the de-bromination reaction of $1, 2$-dibromoethane is:

Identify product $C$ in the following reaction: Propylene dibromide $\xrightarrow[\text{Alcohol}]{Zn, \Delta} A$ $\xrightarrow{HBr} B$ $\xrightarrow{Na, \text{ether}} C$

Identify the alkadiene molecule from the following.

Which of the following reagents is used to test for the unsaturation of an alkene?