Chemistry Question Bank

In a homogeneous system , all the reactants and products are in the

Which of the following reaction(s) is/are in homogeneous equilibria? (a) N g 3H g 2NH g (b) CH COOC H aq H O l CH COOH aq C H OH aq (c) Fe aq SCN aq Fe SCN aq

What is the relation between Kp and Kc for a general reaction, aA bB cC dD? (a) n p c K K RT (b) n c p K K RT (c) p n c K K RT (d) c n p K K RT

PCl5, PCl3 and Cl2 are at equilibrium at 500 K and having concentration 1.59 M PCl3, 1.59 M Cl2 and 1.41 M PCl5 . Calculate Kc for the reaction. PCl PCl Cl

For the equilibrium 2NOCl g 2NO g Cl g the value of the equilibrium constant, Kc is 3.75 10 x at 1069 K. Calculate the Kp for the reaction at this temperature.

Equilibrium in a system having more than one phase is called

Which of the following reactions (s) show(s) heterogeneous equilibria? (a) N g 3H g 2NH g (b) H O l H O g (c) CaCO s CaO s CO g

For CaCO s CaO s CO g ; the equilibrium constant (Kc and Kp) for the thermal decomposition of calcium carbonate is (a) c p CO K CO g ;K p (b) c p CaCO K CaCO s ;K p (c) c p CaO K CaO s ;K p …

K1 and K2 are equilibrium constant for reactions (1) and (2) N2(g) + O2(g) 2 NO (g) ....... (1) NO(g) N (g) O (g) .........(2) (a) K K

In the two gaseous reactions (i) and (ii), at 25ºC (i) NO(g) + 1/2O2(g) NO2(g); K1 (ii) 2NO2(g) 2NO(g) + O2 (g), K2 the equilibrium constants K1 and K2 are related as

If the equilibrium constant of the reaction 2HI H I is 0.25, then the equilibrium constant for the reaction H I 2HI would be

If K1 and K2 are respective equilibrium constants for the two reactions XeF6(g) + H2O (g) XeOF4(g) + 2HF (g) XeO4(g) + XeF6 (g) XeOF4(g) + XeO3F2(g) the equilibrium constant for the reaction XeO4(g) + 2HF (g) XeO3F2(…

Equilibrium constants k1 and k2 for the following equilibria NO(g) + 1 2 O2 NO2(g) and 2NO2(g) 2NO(g) + O2(g) are related as (a) K K (b) K K (c) K K (d) K K

Two gaseous equilibria SO (g) O (g) SO3(g)and 2SO3(g) 2SO2(g) + O2(g) have equilibrium constants K1 and K2 respectively at 298 K. Which of the following relationships between K1 and K2 is correct

At a given temperature, the equilibrium constant for reaction PCl5(g) PCl3(g) + Cl2(g) is 2.4 × 10–3. At the same temperature, the equilibrium constant for reaction PCl3(g) + Cl2(g) PCl5(g) is

The equilibrium constant for the reaction N2(g) + O2(g) 2NO(g) at temperature T is 4×10–4. The value of Kc for the reaction NO N (g) O (g) at the same temperature is

4 moles of A are mixed with 4 moles of B. At equilibrium for the reaction A + B C + D, 2 moles of C and D are formed. The equilibrium constant for the reaction will be

On a given condition, the equilibrium concentration of HI, H2 and I2 are 0.80, 0.10 and 0.10 mole/litre. The equilibrium constant for the reaction H2 + I2 2HI will be

For the system A(g) + 2B(g) C(g),the equilibrium

In a reaction A + B C + D, the equilibrium concentrations of A, B, C and D (in moles/litre) are 0.5, 0.8, 0.4 and 1.0 respectively. The equilibrium constant is

A + B C + D. If finally the concentration of A and B are both equal but at equilibrium concentration of D will be twice of that of A then what will be the equilibrium constant of reaction.

For the reaction 2SO2 + O2 2SO3, the units of Kc are

The equilibrium concentration of X, Y and YX2 are 4, 2 and 2 moles respectively for the equilibrium 2X + Y YX2. The value of Kc is

In a 500 ml capacity vessel CO and Cl2 are mixed to form COCl2. At equilibrium, it contains 0.2 moles of COCl2 and 0.1 mole of each of CO and Cl2. The equilibrium constant Kc for the reaction CO + Cl2 COCl2 is

4.5 moles each of hydrogen and iodine heated in a sealed ten litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium constant for H2(g) + I2(g) 2 HI(g) is