Alcohols Phenol...

$$(CH_3)_2CHCH_2C \equiv N\xrightarrow[Heat]{HCl,H_2O} A \xrightarrow[II.H_2O]{I.LiAlH_4} B \xrightarrow [CH_2Cl_2]{PCC} C$$. The compound 'C'  is:

Consider the following sequence of reactions:
$${ C }_{ 2 }{ H }_{ 5 }-C\equiv CH\xrightarrow { { CH }_{ 3 }MgBr } (A)\xrightarrow [ HCHO ]{ { H }_{ 2 }{ O } } (B)$$
The product (B) is:

In the reaction sequence

The product 'B' is

Adipic acid $$\xrightarrow {P_2O_2 \triangle}{-CO_2-H-2O}A\xrightarrow {dil OH}{\triangle} B$$
The compound B can be:

In the reaction $$CH_3CH_2ONa + CH_3CH_2OSO_2CH_3 \xrightarrow[heat]{THF}$$   the product formed is

$$0.234g$$ of an organic compound containing nitrogen was Kjeldahlized and ammonia gas evolved was absorbed in $$90.3mL$$ of $$\cfrac{1}{10}N$$ $$HCl$$. Unused acid required $$20mL$$ of $$0.2N$$ $$NaOH$$ for complete neutralization. The percentage of nitrogen in the sample is:

If the boiling point of ethanol (molecular weight= 46) is $$78^oC$$, what is the boiling point of diethyl ether (molecular weight = 46)?

Dehydration of following alcohols will be in order :

Structure of $$C_3H_7Br$$ should be