JEE (Advanced) 2012 Paper-2

$$NiCl_2\left\{P (C_2H_5)_2(C_6H_5)\right\}_2$$ exhibits temperature dependentmagnetic behaviour (paramagnetic/ diamagnetic). the coordination geometries of $$Ni^{2+}$$ in the paramagnetic and diamagnetic states are respectively

The reaction of white phosphorous with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type; the oxidation states of phosphorous in phosphine and the other product are respectively

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are

The compound that undergoes decarboxlylationmost readily under mild condition is

Using the data provided, calculate the multiple bond energy $$(kJ mol^{-1})$$ of a $$C \equiv C$$ bond $$C_2H_2$$. That energy is (take the bond energy of a C-H bond as 350 kJ $$mol^{-1}$$)

$$2C(s) + H_2(g) \rightarrow C_2H_2(g)$$                          $$\triangle H = 225 kJ mol^{-1}$$

$$2C(s)  \rightarrow 2C(g)$$                                              $$\triangle H = 1410 kJ mol^{-1}$$

$$H_2(g) \rightarrow 2H(g)$$                                             $$\triangle H = 330 kJ mol^{-1}$$

The shape of $$XeO_2F_2$$ molecule is

The major product H in the given reaction sequence is

For a dilute solution containing 2.5 g of a non- volatile non- electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is $$2^\circ C$$. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take $$K_b = 0.76$$ K kg $$mol^{-1}$$)

The solubility product ($$K_{sp};mol^3 dm^{-9}$$) of $$MX_2$$ at 298 based on the information available the given concentration cell is (take $$2.303 \times R \times \frac{298}{F} = 0.059 V$$)

The value of $$\triangle G (kJ mol^{-1})$$ for the given cell is (take 1F = 96500 C $$mol^{-1}$$)