Chemistry Question Bank

A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the contain…

Which one of the following conditions will favour maximum formation of the product in the reaction, A2 (g) + B2 (g) X2 (g); rH = – X kJ? (NEET 2018)

Hydrolysis of sucrose is given by the following reaction : Sucrose H O Glucose Fructose If the equilibrium constant (KC) is 2 10 x at 300 K, the value of o rG at the same temperature will be (NEET 2020) (a) 8.3…

3O2 (g) ⇌ 2O3(g) for the above reaction at 298 K, Kc is found to be 3.0 × 10-59. If the conc. of O2 at equilibrium is 0.040 M then concentration of O3 in M is. (NEET 2022)

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

One mole of SO3 was placed in a vessel of 1 litre capacity at a certain temperature when the following equilibrium was established 2 SO3 2 SO2 + O2 At equilibrium, 0.6 moles of SO2 were formed. The equilibrium consta…

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

Two moles of each reactant A and B are taken in a reaction flask. They react in the following manner, A(g) B(g) C(g) D(g) At equilibrium, it was found that the concentration of C is triple to that of B. The equili…

Standard free energy change for an equilibrium is zero, the value of Kp is (HARYANA PMT 2009)

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

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

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

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…

At the equilibrium of the reaction, N2O4 (g) 2 NO2 (g), the observed molecular weight of N2O4 is 80 g mol –1 at 350 K. The percentage of dissociation of N2O4 (g) at 350 K is

The vapour density of completely dissociated NH4Cl would be