# 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

Subtopic:  Kp, Kc & Factors Affecting them |
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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

Subtopic:  Kp, Kc & Factors Affecting them |
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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

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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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

Subtopic:  Introduction To Equilibrium |
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For the equilibrium, PCl5 $⇌$ PCl3 + Cl2,

${\mathrm{K}}_{\mathrm{C}}={\mathrm{\alpha }}^{2}/\left(1-\mathrm{\alpha }\right)\mathrm{V}$, 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.

Subtopic:  Kp, Kc & Factors Affecting them |
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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

Subtopic:  Le Chatelier's principle |
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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

Subtopic:  Kp, Kc & Factors Affecting them |
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The correct order of increasing [H3O+] in the following aqueous solutions is:

1. 0.01 M H2S < 0.01 M H2SO4<0.01 M NaCl<0.01M NaNO2

2. 0.01 M NaCl< 0.01 M NaNO2<0.01 M H2S< 0.01 M H2SO4

3. 0.01 M NaNO2<0.01 M NaCl<0.01 M H2S<0.01 M H2SO4

4. 0.01 M H2S<0.01 M NaNO2<0.01 M NaCl<0.01 M H2SO4

Subtopic:  Kp, Kc & Factors Affecting them |
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If the pressure of N2 and H2 mixture in a closed apparatus is 100 atm and 20% of the mixture then reacts, the pressure at  the same temperature would be:

1. 100

2. 90

3. 85

4. 80

Subtopic:  Introduction To Equilibrium |
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The following reactions are known to occur in the body,

CO2 + H2O$⇌$H2CO3$⇌$H+ + HCO3-

If CO2 escapes from the system, then:

1. pH will decrease

2. hydrogen ion concentration will diminish

3. H2CO3 concentration will be unaltered

4. the forward reaction will be promoted

Subtopic:  Le Chatelier's principle |
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