Identify product $P$ in the following reaction: $C_2H_5MgBr + NH_3 \rightarrow P$

If a mixture of methyl iodide and ethyl iodide in equal proportions is treated with metallic sodium in dry ether,the number of possible products obtained will be ....................

Give the general formula of the alkane series and discuss the structure of methane.

Give the order for the substitution of hydrogen atoms in alkane compounds.

The number of monobromo isomers of neopentane is ........ .

How many types of carbon atoms are present in $2,2,3-$trimethylpentane?