JEE (Advanced) 2012 Paper-2

Instructions

For the following questions answer them individually

Question 21

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

Video Solution
Question 22

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

Video Solution
Question 23

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

Video Solution
Question 24

The compound that undergoes decarboxlylationmost readily under mild condition is

Video Solution
Question 25

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 $$mol^{-1}$$)

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

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

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

Video Solution
Question 26

The shape of $$XeO_2F_2$$ molecule is

Video Solution
Question 27

The major product H in the given reaction sequence is

Video Solution
Question 28

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 $$mol^{-1}$$)

Video Solution
Instructions

The electrochemical cell shown below is a concentration cell.
$$M \mid M^{2+}$$ (saturated solution of a sparingly soluble salt, $$MX_2$$) $$\parallel M^{2+}$$ (0.001 mol $$dm^{-3}$$) $$\mid M$$
The emf of the cell depends on the difference in concetration of $$M^{2+}$$ ions at the two electrodes. The emf of the cell at 298 is 0.059 V

Question 29

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 $$2.303 \times R \times \frac{298}{F} = 0.059 V$$)

Video Solution
Question 30

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

Video Solution

Register with

OR
cracku

Boost your Prep!

Download App