What is the relationship between the degree of dissociation (α) of PCl5 and the pressure at equilibrium in the reaction: PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)?
1.
2.
3.
4.
Given a system:
If the concentration of C at eqilibrium is increased by a factor 2, it will cause the eqilibrium concentration of B to change to:
1. two times of its original value
2. one half of its original value
3. 2 times of its original value
4. times of its original value
A weak acid, HA has a Ka of 1.00 x 10-5. If 0.100 mole of this acid is dissolved in one litre of water, the percentage of acid dissociated at equibrium is closest to
1. 99.9%
2. 1.00%
3. 99.9%
4. 0.100%
If little heat is added to ice liquid equilibrium in a sealed container, then:
1. Pressure will rise
2. Temperature will rise
3. Temperature will fall
4. No change in P and T
In the equilibrium,
2SO2(g) + O2 (g) 2SO3(g), the partial pressure of SO2, O2 and SO3 are 0.662, 0.101 and 0.331 atm respectively. What should be the partial pressure of oxygen so that the equilibrium concentration of SO2 and SO3 are equal.
1. 0.4 atm
2. 1.0 atm
3. 0.8 atm
4. 0.25 atm
Ionisation constant of CH3COOH is 1.7 X 10-5 and concentration of H+ ions is 3.4 X 10-4.Then, find out initial concentration of CH3COOH molecules.
1. 3.4 X 10-4
2. 3.4 X 10-3
3. 6.8 X 10-4
4. 6.8 X 10-3
The formation of phosgene is represented as,
CO + Cl2 COCl2
The reaction is carried out in 500 mL flask. At equilibrium o.3 mole of phosgene, 0.1 mole of CO and 0.1 mole of Cl2 are present. The equilibrium constant of the reaction is:
1. 30
2. 15
3. 5
4. 3
For the equilibrium, PCl5 PCl3 + Cl2,
, temperature remaining constant:
1. Kc will increase with the increase in volume
2. Kc will increase with the decrease in volume
3. Kc will not change with the change in volume
4. Kc may increase or decrease with the change in volume depending upon its numerical value.
For the reaction,
PCl5(g) PCl3(g) + Cl2 (g)
The forward reaction at constant temperature is favoured by:
1. Introducing an inert gas at a constant volume
2. Introducing chlorine gas at a constant volume
3. Introducing an inert gas at constant pressure
4. None of the above
In the dissociation of 2HI H2 + I2, the degree of dissociation will be influenced by the:
1. Addition of inert gas at constant volume
2. Addition of inert gas at constant pressure
3. Increase of temperature
4. Increase of pressure