Chemistry Question Bank

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

In the reaction, H2 + I2 2HI. In a 2 litre flask 0.4 moles of each H2 and I2 are taken. At equilibrium 0.5 moles of HI are formed. What will be the value of equilibrium constant, Kc

2 mol of N2 is mixed with 6 mol of H2 in a closed vessel of one litre capacity. If 50% of N2 is converted into NH3 at equilibrium, the value of Kc for the reaction N2(g) + 3H2(g) 2NH3(g) is

A mixture of 0.3 mole of H2 and 0.3 mole of I2 is allowed to react in a 10 litre evacuated flask at 500ºC. The reaction is H I 2HI , the K is found to be 64. The amount of unreacted 2I at equilibrium is

0.6 mole of NH3 in a reaction vessel of 2dm3 capacity was brought to equilibrium. The vessel was then found to contain 0.15 mole of H2 formed by the reaction 2NH3(g) N2(g) + 3H2(g) Which of the following statements i…

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)

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

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 ?

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)