Clemmensen reduction involves the conversion of $ >C=O $ to $ >CH_2 $ in the presence of:

Identify the major product obtained in the following reaction:

Treatment of cyclopentanone with methyl lithium gives which of the following species?

Consider the following reactions:
$A$ $\xrightarrow[(i) CH_3MgBr]{(ii) H_3O^{+}} B$ $\xrightarrow[573 \text{ K}]{Cu} 2\text{-methyl-2-butene}$
The mass percentage of carbon in $A$ is:

The starting material is $2,3-\text{dimethylbut-2-ene}$. It undergoes ozonolysis followed by reduction with $Zn/H_2O$ to form product $A$. Product $A$ then reacts with $CH_3MgBr$ followed by hydrolysis to form product $B$. Identify product $B$.

The final product of the following reaction is/are: