Chemistry Question Bank

The effect of increasing the pressure on the equilibrium 2A(g) + 3B(g) 3A(g) + 2B(g) is

Following gaseous reaction is undergoing in a vessel C2H4 + H2 C2H6; H = – 32.7 Kcal Which will increase the equilibrium concentration of C2H6

In the reaction A(g) + 2B(g) C(g) + Q kJ, greater product will be obtained or the forward reaction is favoured by

In which of the following equilibria, the value of Kp is less than Kc

For N2(g) + 3H2(g) 2NH3(g) + heat

In which of the following gaseous reaction, the value of Kp will be equal to Kc

Calculate c K for the reversible process given below if p K 167 and T = 800ºC CaCO (s) CaO(s) CO (g)

For which one of the following reactions p c K K ? (a) PCl PCl Cl (b) N O 2NO (c) N 3H 2NH (d) 2SO 2SO O

Kc for the reaction N2 (g) + O2 (g) 2 NO (g) at 300 K is 4.0 × 10–6. Kp for the above reaction will be (R = 2 cal mol–1 K–1)

For reaction PCl3 (g) + Cl2 (g) PCl5 (g), the value of Kc at 250ºC is 26. The value of Kp at this temperature will be :

If Kp for a reaction A (g) + 2 B (g) 3 C (g) + D (g) is 0.05 atm at 1000 K. Its Kc in terms of R will be

In the above reaction one mole each of the acetic acid and alcohol are heated in the presence of little conc. H2SO4. On equilibrium being attained

When 3 moles of ethyl alcohol are mixed with 3 moles of acetic acid, 2 moles of ester are formed at equilibrium according to the equation CH3COOH + C2H5OH CH3COOC2H5 + H2O The value of the equilibrium constant for the…

1.1 mole of A is mixed with 2.2 mole of B and the mixture is kept in a one-litre flask till the equilibrium, A + 2B 2C + D is reached. At equilibrium 0.2 mol of C is formed. The equilibrium constant of the above react…

4 moles of A are mixed with 4 moles of B when 2 moles of C are formed at equilibrium according to the reaction A + B C + D The value of the equilibrium constant is

56 g of N2 and 6g H2 were kept at 400ºC in l litre vessel. The equilibrium mixture contained 27.54g of NH3. The approximate value of Kc for the above reaction in mol-2 lit2 is

Two moles of HI were heated in a sealed tube at 440ºC till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

The decomposition of N2O4 to NO2 is carried out at 280º C in chloroform. When equilibrium is reached 0.2 mol of N2O4 and 2 × 10–3mol of NO2 are present in 2 litre solution. The equilibrium constant for the reaction N2…

For the system A (g) + 2 B (g) C (g) the equilibrium concentrations are A = 0.06 mol L–1 B = 0.12 mol L–1 C = 0.216 mol L–1. The Keq for the reaction is

In an exothermic reaction, a 10oC rise in temperature will

In the gas phase reaction C2H4 + H2 C2H6, the equilibrium constant can be expressed in units of :

For the homogeneous reaction 4 NH3 + 5 O2 4 NO + 6 H2O the equilibrium constant Kc has the units of

The equilibrium constant (Kp) for the reaction PCl5(g) PCl3(g) + Cl2(g) is 16. If the volume of the container is reduced to one half its original volume, the value of Kp for the reaction at the same temperature will be

Calculate the partial pressure of carbon monoxide from the following CaCO3 (s) CaO(s) + CO2; Kp = 8 × 10–2 CO2(g) + C (s) 2CO(g) ; Kp = 2

An amount of solid NH4HS is placed in a flask already containing ammonia gas at a certain temperature and 0.50 atm. pressure. Ammonium hydrogen sulphide decomposes to yield NH3 and H2S gases in the flask. When the dec…