The solution containing $$3 \mathrm{~g}$$ urea (molar mass 60 ) per $$\mathrm{dm}^3$$ of water and another solution containing $$4.5 \mathrm{~g}$$ of solute $$\mathrm{A}$$ per $$\mathrm{dm}^3$$ boils at same temperature, then what is molar mass of $$\mathrm{A}$$ ?

Which following statement is true for vinylic halide?

What is the formal charge on 'N' atom in

ion?

Identify the product 'B' in the following series of reactions.

$$\mathrm{CH_3COOH+CH_3CH_2OH}$$ $$\stackrel{\mathrm{H}^{+}}{\rightleftharpoons} A \xrightarrow[\mathrm{Ni} / \mathrm{Pd}, \Delta]{\mathrm{H}_2}$$ B