Chemical Equili...

An amount of solid \(\mathrm{N} \mathrm{H}_{4} \mathrm{HS}\) is placed in a flask already containing ammonia gas at a certain temperature and \(0.50\) atm pressure Ammonium hydrogen sulphide decomposes to yield \(\mathrm{N} \mathrm{H}_{3}\) and \(\mathrm{H}_{2} \mathrm{~S}\) gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to \(0.84\) atm. The equilibrium constant for \(\mathrm{NH}_{4}\) HS decomposition at this temperature is:

H₂O(l) ⇌ H₂O (vap). This equation best illustrates the

The mass of a gas dissolved in a given mass of a solvent at any temperature is proportional to the pressure of the gas above the solvent.

The Bronsted acid which gives the weakest conjugate base is

In the dynamic equilibrium stage, one of the following events take place. Choose the right one.

The dynamic nature of chemical equilibrium can be demonstrated in the synthesis of ammonia by Haber.s process. Choose the appropriate option given below

The factor that does not affect the state of equilibrium is 

When the rate of evaporation is equal to the rate of condensation, it is called

pK_a values of four acids are given below at 25°C. Indicate the strongest acid.

Which of the following represent(s) conjugate(s) of NH₃?

pH of an acid buffer is given by

The equilibrium constant K_p for thermal dissociation of PCl₅ at 200^oC is 1.6 atm. The pressure (in atm) at which it is 50% dissociated at the same temperature is

A solution which resists the change in its pH value on addition of some amount of acid or base is called

In the reaction 3A + 2B  2C, the equilibrium constant K_c is given by

Which one of the following is not a Lewis base?

The equilibrium constant for the reaction 2NO₂ (g)  2NO (g) + O₂ (g) is 2  10^-6. The equilibrium constant for the reaction 4NO(g) + 2O₂ (g) 4NO₂ (g) at the same temperature would be

For the reaction, H₂(g) + I₂(g) 2HI (g), the value of K_p changes with

When aqueous solutions of two acids have the same concentration of common ions, they are called 

Which of the following changes will shift the given reaction towards the product?

l₂ (g) ⇌ 2l (g), (298 K) = +150 kJ

In which of the following solvents does AgBr have the greatest solubility?

the rates of transfer of molecules from ice into water and of reverse transfer from water into ice are equal at atmospheric pressure and 273 K. Both the processes occur simultaneously and at the same rate so that the amount of ice and water remains constant. This process is called

The boiling point of water at atmospheric pressure

A solution of equal pH and pOH is called a

During the process of transformation from liquid to vapour, the pressure exerted by the water molecules at a given temperature remains constant. This is called

What is the equilibrium expression for the reaction P₄ (s) + 5O₂ (g)  P₄O₁₀ (s)?

One mole of a compound AB reacts with one mole of a compound CD according to the equation AB + CD AD + CB. When equilibrium was established, it was found that 3/4 mol each of reactants AB and CD had been converted to AD and CB, respectively. There was no change in volume. The equilibrium constant for the reaction is

If we place solid iodine in a closed vessel, after sometime the vessel gets filled up with violet vapour. When equilibrium is attained, the intensity of colour will be

In the reaction 2O₃ ⇄ 3O₂, the value of K_c is 

The solubility of CO₂ in water increases with

When the soda bottle is opened, some of the dissolved carbon dioxide gas escapes because of