Which one of the following is called amphoteric solvent ?
Ammonium hydroxide
Chloroform
Benzene
Water
100 mL of 0.04 N HCl aqueous solution is mixed with 100 mL of 0.02 N NaOH solution. The pH of the resulting solution is
1.0
1.7
2.0
2.3
If a system is at equilibrium, the rate of forward to the reverse reaction is :
less
equal
high
at equilibrium
The equilibrium constant for the reaction N2(g) + O2(g) 2NO(g) is 4×10-4 at 200K. In presence of a catalyst the equilibrium is attained ten times faster. Therefore the equilibrium constant in presence of catalyst 2000 K is
4×10-3
4×10-2
40×10-4
4×10-4
At a given temperature the equilibrium constant for the reaction of:
PCl5 PCl3 + Cl2 is 2.4 × 10-3. At the same temperature, the equilibrium constant for the reaction
PCl3 (g) + Cl2 (g) PCl5 (g) is :
2.4 × 10-3
-2.4 × 10-3
4.2 × 102
4.8 × 10-2
For the gaseous reaction, C2H4 + H2 C2H6; H = -130 kJ mol-1 carried in a closed vessel, the equilibrium concentration of the C2H6 can definitely be increased by:
increasing temperature and decreasing pressure
decreasing temperature and increasing pressure
increasing temperature and pressure both
decreasing temperature and pressure both
B.
decreasing temperature and increasing pressure
Since, the reaction is exothermic and number of moles of reactants are decreasing. Therefore, the reaction rate is increased by decreasing temperature and increasing pressure.
Which of the following is correct for the reaction?
N2(g) + 3H2 (g) 2NH3 (g)
Kp = Kc
Kp < Kc
Kp > Kc
Pressure is required to predict the correlation
The solubility of CaF2 in pure water is 2.3 × 10-4 mol dm3. Its solubility product will be:
4.6 × 10-4
4.6 × 10-8
6.9 × 10-12
4.9 × 10-11