The trans-alkenes are formed by the reduction of alkynes with:

The major product of the following reaction is :  

Which hydrogen in compound ($\mathrm{E}$) is easily replaceable during bromination reaction in presence of light?

$$\begin{gathered} {\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{CH}={\mathrm{CH}}_2 \\ \mathrm{\delta } \mathrm{\gamma } \mathrm{\beta } \mathrm{\alpha } \\ \left(\mathrm{E}\right) \end{gathered}$$

[JEE MAIN - 2019]
 

The major product of the following reaction is :  

[JEE MAIN- 2019]

Which of the following compounds reacts with ethyl magnesium bromide and also decolourizes bromine water solution:

[JEE MAIN- 2019]

The major product of the following reaction is:

[JEE MAIN-2019]