Chemistry Question Bank

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

In which of the following, the forward reaction is favoured by use of high pressure ?

Which one of the following information can be obtained on the basis of Le Chatelier principle ?

According the Le-Chatelier’s principle, adding heat to a solid and liquid in equilibrium will cause the

For the gas phase reaction 2 NO N2 + O2, H = – 43.5 Kcal mol–1which one of the statement below is true for N2 (g) + O2 (g) 2 NO (g)

Change in volume of the system does not alter the number of moles in which of the following equilibrium

According to Le-Chatelier principle, if heat is given to solid-liquid system, then

The reaction A + B C + D +heat has reached equilibrium. The reaction may be made to proceed forward by

In the following reversible reaction 2SO2 + O2 2SO3 + Q Cal Most suitable condition for the higher production of SO3 is

Which of the following reactions proceed at low pressure

N2 + O2 2NO - Q cals In the above reaction which is the essential condition for the higher production of NO

Assertion : If some PCl5(g) containing labelled phosphorus P31 is added to a system with following equilibrium, after sometime the system was found to contain radioactive PCl3. PCl (g) PCl (g) Cl (g) Reason : Chemic…

In the reaction, A2(g) + 4 B2(g) 2AB4(g) + heat the formation of AB4will be favoured at

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…

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

3.2 moles of hydrogen iodide were heated in a sealed bulb at 444°C till the equilibrium state was reached. Its degree of dissociation at this temperature was found to be 22%. The number of moles of hydrogen iodide pre…