Chemistry Question Bank

When H2 and I2 are mixed and equilibrium is attained, then H I 2HI (PMT 2002)

If N2 + 3H2 2 NH3 – K, then 2N2 + 6H2 4NH3 – ? (PMT 2002)

The reaction quotient (Q) for the reaction N (g) 3H (g) 2NH (g) is given by [NH ] Q . [N ][H ] (CBSE Med. 2003) The reaction will proceed from right to left if

The reaction (g) (g) (g) N O 2NO is endothermic. The forward reaction is (BHU 2003)

Of the following which change will shift the reaction towards the product? (AIIMS 2004) o r I g 2I g , H 298K 150kJ

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…

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)

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

For the reaction r –1 CH (g) 2O (g) CO (g) 2H O( ); H 170.8 kJ mol l (CBSE AIPMT 2006) Which of the following statements is not true ?

Reaction BaO (s) BaO(s) O (g); H ve. In equilibrium condition, pressure of O depends on (PUNJAB PMET 2007)

In which of the following reactions, the concentration of the product is higher than the concentration of reactant at equilibrium? (K = equilibrium constant) (AIIMS 2008)

Assertion For the reaction, N (g) 3H (g) 2NH (g) Unit of Kc = L2 mol–2 Reason For the reaction N (g) 3H (g) 2NH (g) Equilibrium constant, c [NH ] K [N ][H ] (AIIMS 2008)

If the concentration of OHions in the reaction Fe OH s Fe aq 3OH aq is decreased by 4 times, the equilibrium concentration of Fe will increase by (CBSE AIPMT 2008)

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…

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

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)

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 …

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)

Three moles of PCl , three moles of PCl and two moles of Cl are taken in a closed vessel. If at equilibrium the vessel has 1.5 moles of PCl , the number of moles of PCl present in it is (KCET 2008)

5 moles of SO and 5 moles of O are allowed to react. At equilibrium, it was found that 60% of SO is used up. If the total pressure of the equilibrium mixture is one atmosphere, the partial pressure of is (KCET 2009)

2HI g H g I g The equilibrium constant of the above reaction is 6.4 at 300 K. If 0.25 mole each of H and 2I are added to the system, the equilibrium constant will be (KCET 2009)

p K and p K are the equilibrium constants of the two reactions, given below (AMU 2009) N g H g NH g N g 3H g 2NH g Therefore p K and p K are related by (a) p p K K (b) p p K K (c) p p K 2K (d) p p K 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)

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

The equilibrium constants of the following are N 3H 2NH ;K N O 2NO;K H O H O;K The equilibrium constant (K) of the reaction : K 2NH O 2NO 3H O will be (NEET 2017) (a) K K K (b) K K K (c) K K K (d) K K K