Calculate the molar mass of an element having density $$7.8 \mathrm{~g} \mathrm{~cm}^{-3}$$ that forms bcc unit cell. $$\left[\mathrm{a}^3 \cdot \mathrm{N}_{\mathrm{A}}=16.2 \mathrm{~cm}^3 \mathrm{~mol}^{-1}\right]$$

Which among the following compounds exhibits +2 oxidation state of oxygen?

Identify substrate $$\mathrm{A}$$ in the following reaction.

$$\mathrm{A}+\mathrm{AgOH} \underset{\mathrm{ii)}~\Delta}{\stackrel{\text { i) moist } \mathrm{Ag}_2 \mathrm{O}}{\longrightarrow}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{~N}\left(\mathrm{CH}_3\right)_2+\mathrm{CH}_2=\mathrm{CH}_2$$

What volume of $$\mathrm{CO}_{2(\mathrm{~g})}$$ at STP is obtained by complete combustion of $$6 \mathrm{~g}$$ carbon?