The diazonium salt of which of the following compounds will form a coloured dye on reaction with $$\beta$$-Naphthol in NaOH?

Match List - I and List - II.

	List-I		List-II
(a)		(i)	$$\mathrm{Br}_{2} / \mathrm{NaOH}$$
(b)		(ii)	$$\mathrm{H}_{2} / \mathrm{Pd}-\mathrm{BaSO}_{4}$$
(c)		(iii)	$$\mathrm{Zn}(\mathrm{Hg}) / \mathrm{H}$$ Conc. $$\mathrm{HCl}$$
(d)		(iv)	$$\mathrm{Cl}_{2}$$ Red $$\mathrm{P}, \mathrm{H}_{2} \mathrm{O}$$

Choose the correct answer from the options given below :

The formula of a gaseous hydrocarbon which requires 6 times of its own volume of O₂ for complete oxidation and produces 4 times its own volume of CO₂ is C_xH_y. The value of y is _____________.

The solubility product of PbI₂ is 8.0 $$\times$$ 10^$$-$$9. The solubility of lead iodide in 0.1 molar solution of lead nitrate is x $$\times$$ 10^$$-$$6. mol/L. The value of x is __________. (Rounded off to the nearest integer) [Given $$\sqrt 2 $$ = 1.41]