Chemistry Question Bank

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…

The relation between p c K and K for the following reaction is (JCECE 2010) N (g) 3H (g) 2NH (g) -> (a) p c K K (RT) (b) c p K K (RT) (c) c p K K (RT) (d) p c K K (RT)

At 450 K, p K 2.0 / bar x for the given reaction at equilibrium 2SO (g) O (g) 2SO (g) (HARYANA PMT 2010) What is c K at this temperature ? (a) 73.8 x (b) 7.38 10 x

In which of the following equilibrium Kc and Kp are not equal? (AIPMT 2010) (a) 2C s O g 2CO g (b) 2NO g N g O g p K (c) SO g NO g SO g NO g (d) H g I g 2HI g

For the reaction, AB g A g B g AB is 33% dissociated at a total pressure of p. Therefore, p is related to by one of the following options (AMU 2010)

For an equilibrium reaction, the rate constants for the forward and the backward reaction are 2.38 × 10–4 and 8.15 × 10–5 respectively. What will be the equilibrium constant for the reaction ? (RPMT 2010)

For the equilibrium, 2NO (g) N O (g) 14.6 kcal, (CPMT 2009) Increase in temperature

Which reaction is not affected by change in pressure? (AFMC 2009) (a) (g) (g) (g) H I 2HI (b) (s) (g) (g) 2C O 2CO (c) (s) (g) (g) N 3H 2NH (d) (g) (g) (g) PCl PCl Cl

Assertion For the reaction, 2NO g O g 2NO Increase in pressure favours the formation of NO2. Reason The reaction is exothermic (AIIMS 2009)

For the reaction C(s) CO (g) 2CO(g) The partial pressure of CO and CO are 2.0 and 4.0 atm respectively then equilibrium p K for the reaction will be (BCECE 2008)

Equimolar concentrations of H and I are heated to equilibrium in a 2 L flask. At equilibrium, the forward and the backward rate constants are found to be equal. NH N NH What percentage of initial concentration of H …

In the equilibrium 2NH N 3H , 6 moles of is taken in 10 L flask. If concentration of at equilibrium is x, then concentration of at equilibrium is (DUMET 2008)

Now, the total pressure at equilibrium, p(1 α)+pα+0.5pα = P P p = ...(2) 1+0.5α From eq (1) and eq(2), p P P P K 0.5 1 + 0.5α K P 0.5 2K P x x

The dissociation equilibrium of a gas AB can be represented as 2AB (g) 2AB(g) B (g) The degree of dissociation is ‘x’ and is small compared to 1. The expression relating the degree of dissociation (x) with equilibr…

CaCO CaO CO reaction in lime kiln goes to completion because (AFMC 2005)

In the reaction, A(s) B(g) heat 2C(s) 2D(g) at equilibrium, pressure of B is doubled to re- establish the equilibrium. The factor by which concentration of D is changed, is (PMT2005) (a)

Equilibrium constant K1 and K2 for the following equilibria (AIPMT 2005) K NO(g) O NO (g) K 2NO (g) 2NO(g) O (g) are related as (a) K K (b) K K (c) K K (d) K K Ans. (d) Sol. Reaction (2) is a reverse reactio…