Chemistry Question Bank

For exothermic reaction is Sº < 0, then the sketch of log K vs 1/T may be (a) (b) (c) (d)

If standard heat of dissociation of PCl5 is 230 cal, then slope of the graph of log k vs 1 T is

Assertion : For PCl5(g) PCl3(g) + Cl2(g). If more Cl2 is added, the equilibrium will shift in backward direction hence equilibrium constant will decrease. Reason : Addition of inert gas to the equilibrium mixture at…

Assertion :A catalyst does not influence the value of equilibrium constant. Reason : Catalyst influence the rate of both forward and backward reactions equally.

Assertion : The addition of an inert gas under constant volume condition cause the total pressure of the system to increase. This would thus lower the degree of dissociation of PCl5. Reason : Addition of inert gas at …

Assertion : Addition of an inert gas at constant pressure equilibrium will support the dissociation of PCl5 at the same temperature. Reason : The addition of an inert gas will tend to increase the total pressure.

Assertion : For the reaction g g g g A B C D at the given temperature, there will be no effect by addition of inert gas either at constant pressure or at constant volume. Reason : For the reaction where n = 0,…

Assertion : Kp is equal to Kc for the following reaction: N2(g) + O2(g) 2NO(g) Reason : Kp and Kc are interrelated by the following equation : g n p c K K (RT) ng = Number of gaseous moles of products – Number of g…

Assertion : If the equation for a reaction is reversed, the equilibrium constant is inverted and if the equation is multiplied by 2, the equilibrium constant is squared. Reason : The numerical value of equilibrium con…

Assertion : For a reversible reaction, Gibbs’ free energy is zero at equilibrium. Reason : As reaction approaches equilibrium, Gibbs’ free energy decreases.

Assertion : If some PCl5(g) containing labelled phosphorus P31 is added to a system with following equilibrium, after sometime the system was found to contain radioactive PCl3. PCl (g) PCl (g) Cl (g) Reason : Chemic…

Assertion : For a reaction at equilibrium, the free energy for the reaction is minimum. Reason : The free energy for both reactants and products decreases and become equal.

Which of the following statements is correct for a reversible process in a state of equilibrium? (NEET 2015) (a) o G 2.30RT log K (b) o G 2.30 RT log K

If the value of equilibrium constant for a particular reaction is 1.6 10 x , then at equilibrium the system will contain (NEET 2015)

If the equilibrium constant for 2 g 2 g g N O 2NO is K, the equilibrium constant for 2 g 2 g g N O NO will be (NEET 2015)

Which of the following statement is correct for a reversible process in a state of equilibrium ? (AIPMT 2015) (a) G = 2.30 RT log K (b) o G = –2.30 RT log K (c) o G = 2.30 RT log K (d) G = – 2.30 RT log K

If the value of an equilibrium constant for a particular reaction is 1.6 × 1012, then at equilibrium the system will contain (AIPMT 2015) (a)mostly reactants

For the reversible reaction (AIPMT 2014) N (g) 3H (g) 2NH (g) Heat The equilibrium shifts in forward direction

For the reaction, C(s) + CO2(g) 2CO(g), p K 63atm at 1000 K. If at equilibrium CO CO p 10p , than the total pressure of the gases at equilibrium is (KERELA CEE 2011)

In the reaction, AB (g) A(g) + B(g) at 30ºC, Kp for the dissociation equilibrium is 2.56 × 10–2 atm. If the total pressure at equilibrium is 1 atm, then the percentage dissociation of AB is (KERELA CEE 2011)

The value of H for the reaction, (AIPMT 2011) X g 4Y g 2XY g is less than zero. Formation of XY4(g) will be favoured at

Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively. SO g O g SO g (KCET 2011) 2SO g 2SO g O g The equilibrium constants are related as (a) 2K K (b) K K (c) K K (d)…

For the reaction, N (g) O (g) 2NO(g) , the equilibrium constant is K1. The equilibrium constant is K2 for the reaction, 2NO(g) O (g) 2NO (g) . What is K for the reaction NO (g) N (g) O (g) (AIPMT 2011) (a) (K…

What is c K for the following equilibrium when equilibrium concentration of each substance is [SO ] 0.60 M, [O ] 0.82 M and [SO ] 1.90 M ? (VMMC 2010) 2SO (g) O (g) 2SO (g)

In which one of the following gaseous equilibria, p K is less than c K ? (CMC LUDHIYANA 2010) (a) N O 2NO (b) 2SO O 2SO (c) 2HI H I (d) N O 2NO