Chemistry Question Bank

The standard state Gibb’s free energy change for the isomerization reaction cis-2-pentene trans-2-pentene is –3.67 kJ mol–1 at 400 K. If more trans-2-pentene is added to the reaction vessel

For a reversible reaction : A + B C dx dt = 2.0 × 103 L mol–1 s–1 [A] [B] – 1.0 × 102 s–1 [C] where x is the amount of ‘A’ dissociated. The value of equilibrium constant (Keq) is :

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted to CO on addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is :

The free energy of formation of NO is 78 kJ mol–1 at the temperature of an automobile engine (1000 K). What is the equilibrium constant for this reaction at 1000 K ? N (g) O (g) NO(g)

For the reaction, A B + C, at equilibrium, the concentration of A is 1 × 10–3 M, B is 0.15 and C is 0.05 M. The Gº for the hydrolysis of A at 27ºC will be :

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

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

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

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

The equilibrium SO2Cl2 (g) SO2 (g) + Cl2 (g) is attained at 25ºC in a closed container and an inert gas, helium is introduced. Which of the following statement is correct ? (PMT 2000)

Which of the following equilibria will shift to right side on increasing the temperature ? (PMT 2000)

The volume of the reaction vessel containing an equilibrium mixture is increased, while holding the temperature constant for the following reaction : SO2Cl2(g) SO2(g) + Cl2(g) When equilibrium is re-established, which…

In the equilibrium reaction AgCl(s) + 2NH3(g) 3 2 Ag(NH ) (aq) Cl (aq), an increase in the concentration of Cl –(aq) causes

Densities of diamond and graphite are 3.5 and 2.3 g/mL respectively. Increase of pressure on the equilibrium C (diamond) C (graphite)

When a liquid in equilibrium with its vapour is heated

Consider the following equilibria for gases : H2S(g) H2S(aq) + 4.6 Kcal ; SO2(g) SO2(aq) + 8.6 Kcal. Assuming the randomness factor to be about the same for each, which of the gases will have the lower solubility in…

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)

If the value of an equilibrium constant for a particular reaction is 1.6 × 1012, then at equilibrium the system will contain (AIPMT 2015) (a)mostly reactants

For the reversible reaction (AIPMT 2014) N (g) 3H (g) 2NH (g) Heat The equilibrium shifts in forward direction

For the reaction, C(s) + CO2(g) 2CO(g), p K 63atm at 1000 K. If at equilibrium CO CO p 10p , than the total pressure of the gases at equilibrium is (KERELA CEE 2011)

In the reaction, AB (g) A(g) + B(g) at 30ºC, Kp for the dissociation equilibrium is 2.56 × 10–2 atm. If the total pressure at equilibrium is 1 atm, then the percentage dissociation of AB is (KERELA CEE 2011)

The value of H for the reaction, (AIPMT 2011) X g 4Y g 2XY g is less than zero. Formation of XY4(g) will be favoured at

Consider the following gaseous equilibria with equilibrium constants K1 and K2 respectively. SO g O g SO g (KCET 2011) 2SO g 2SO g O g The equilibrium constants are related as (a) 2K K (b) K K (c) K K (d)…

For the reaction, N (g) O (g) 2NO(g) , the equilibrium constant is K1. The equilibrium constant is K2 for the reaction, 2NO(g) O (g) 2NO (g) . What is K for the reaction NO (g) N (g) O (g) (AIPMT 2011) (a) (K…

What is c K for the following equilibrium when equilibrium concentration of each substance is [SO ] 0.60 M, [O ] 0.82 M and [SO ] 1.90 M ? (VMMC 2010) 2SO (g) O (g) 2SO (g)