11.

On increasing temperature, the equilibrium constant of exothermic and endothermic reactions, respectively

• increases and decreases

• decreases and increases

• increases and increases

• decreases and decreases

What is the pH of the NaOH solution when 0.04 g of it dissolved in water and made to 100 mL solution?

• 2

• 1

• 13

• 12

Identify the correct statement.

• Lead forms compounds in +2 oxidation state due to inert pair effect.

• All halogens show only negative oxidation state.

• Catenation property increases from boron to oxygen.

• Oxadation state of oxygen is - 1 in ozonides.

The bond angle of bond in methoxy methane is

• 111.7°

• 109°

• 108.9°

• 180°

Which of the following compounds has zero dipole moment?

• 1, 4-dichlorobenzene

• 1, 2-dichlorobenzene

• 1, 3-dichlorobenzene

• 1-chloro-2-methyl benzene

A gas 'X' is dissolved in water at 2 bar pressure. Its mole fraction is 0.02 in solution. The mole fraction of water when the pressure of gas is doubled at the same temperature is

• 0.04

• 0.98

• 0.96

• 0.02

Calculate $∆\mathrm{G}°$ for the following cell reaction:

Zn (s) + Ag₂O (s) + H₂O (l) → Zn${}_{\mathrm{n}}^{2+}$ (aq) + 2Ag (s) + 2OH^- (aq)

E${}_{{\mathrm{Ag}}^{+}/ \mathrm{Ag}}^{°}$ = 0.80 V and E${}_{{\mathrm{Zn}}^{2+}/ \mathrm{Zn}}^{°}$ = -0.76 V

• -305 kJ/ mol

• -301 kJ/ mol

• 305 kJ/ mol

• 301 kJ/ mol

Which one of the following is correct with respect to basic character?

• P(CH₃)₃ > PH₃

• PH₃ > P(CH₃)₃

• PH₃ > NH₃

• PH₃ = NH₃

On the top of mountain, water boils at

• high temperature

• same temperature

• high pressure

• low temperature

Which of the following methods is used for the removal of temporary hardness of water?

• Treatment with washing soda

• Calgon method

• lon-exchange method

• Clark's method