If little heat is added to ice $\rightleftharpoons$ liquid equilibrium in a sealed container, then:

In the equilibrium,

2SO₂(g) + O₂ (g) $\rightleftharpoons$2SO₃(g), the partial pressure of SO₂, O₂ and SO₃ are 0.662, 0.101 and 0.331 atm respectively. What should be the partial pressure of oxygen so that the equilibrium concentration of SO₂ and SO₃ are equal.

Ionisation constant of CH₃COOH is 1.7 X 10^-5 and concentration of H⁺ ions is 3.4 X 10^-4.Then, find out initial concentration of CH₃COOH molecules.            

The formation of phosgene is represented as,

            CO + Cl₂ $\rightleftharpoons$COCl₂

The reaction is carried out in 500 mL flask. At equilibrium o.3 mole of phosgene, 0.1 mole of CO and 0.1 mole of Cl₂ are present. The equilibrium constant of the reaction is:

For the equilibrium, PCl₅ $\rightleftharpoons$ PCl₃ + Cl₂,

${\mathrm{K}}_{\mathrm{C}}={\mathrm{\alpha }}^2/(1-\mathrm{\alpha })\mathrm{V}$, temperature remaining constant:

For the reaction,

  PCl₅(g) $\rightleftharpoons$PCl₃(g) + Cl₂ (g)

The forward reaction at constant temperature is favoured by

In the dissociation of 2HI $\rightleftharpoons$H₂ + I₂, the degree of dissociation will be influenced by the:

The correct order of increasing [H₃O⁺] in the following aqueous solutions is:

If the pressure of N₂ and H₂ mixture in a closed apparatus is 100 atm and 20% of the mixture then reacts, the pressure at  the same temperature would be:

The following reactions are known to occur in the body,

    CO₂ + H₂O$\rightleftharpoons$H₂CO₃$\rightleftharpoons$H⁺ + HCO₃^-                 

If CO₂ escapes from the system, then:

Which salt undergoes hydrolysis?

Buffer solution among the following options is :           

According to Le-Chatelier's principle, adding heat to a solid $\rightleftharpoons$liquid equilibrium will cause the 

Ostwald's solution dilution law is applicable in the case of the solution of:

The pK_a of acetylsalicylic acid (aspirin) is 3.5. The pH of gastric juice in the human stomach is about 2-3 and the pH in the small intestine is about 8. Aspirin will be:

What is [H⁺] in mol/L of a solution that is 0.20 M in CH₃COONa and 0.10 M in CH₃COOH?

(K_a for CH₃COOH = 1.8 x 10^-5)       

The hydrolysis of the salt of strong acid and a weak base is called:

For the reaction, A+B$\rightleftharpoons$3C at 25$°$ C, a 3 litre vessel contains 1,2, 4 mole of A, B and C respectively. If K_c for the reaction is 10, the reaction will proceed in:

The pH of 0.1M soution of the folowing salts increases in the order:

The equilibrium constant Br₂ $\rightleftharpoons$2Br at 500 K and 700 K are 10^-10 and 10^-5 respectively. The reaction is:

(a) endothermic                                  (b) exothermic

(c) fast                                               (d) slow

Three reactions involving ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ are given below:

(i) H₃PO₄ + H₂O $\to$H₃O⁺ + ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$

(ii) ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ + H₂O $\to$${\mathrm{HPO}}_4^{2-}$ + H₃O⁺

(iii) ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ + OH^- $\to$H₃PO₄ +O^2-

In which of the above does ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$ act as an acid?

Which of the following is most soluble in water?

The compound that does not act as Lewis acid is:

For which salt the pH of its solution does not change with dilution?

For a sparingly soluble salt A^pB^q, the relationship of its solubility product (L_s) with its solubility (s) is:

For the reaction, N₂ + 3H₂ $\rightleftharpoons$2NH₃ in a vessel, after the addition of an equal number of mole of N₂ and H₂, the equilibrium state is formed. Which of the following is correct?

The conjugate base of [Al(H₂O)₃(OH)₃] is:

For NH₄HS(s) $\rightleftharpoons$NH₃ (g) + H₂S(g), the observed pressure for reaction mixture in equilibrium is 1.12 atm at 106$°$C. The value of K_p for the reaction is:

Which oxide of nitrogen is the most stable?

On adding A to the reaction at equilibrium,  AB(s) $\rightleftharpoons$ A(g) + B(g), the new equilibrium concentration of A becomes double, the equilibrium concentration of B would become:

2 mole of PCl₅ were heated in a closed vessel of 2 litre capacity. At equilibrium 40% of PCl₅ dissociated into PCl₃ and Cl₂. The value of the equilibrium constant is :

Given, HF + H₂O$\stackrel{K_{\mathit{a}}}{\to }$H₃O⁺ + F^-

          F^- + H₂O $\stackrel{K_b}{\to }$HF + OH^-

which relation is correct?

The value sf K_p1 and K_p2 for the reactions

              X$\rightleftharpoons$Y+Z                                          ....(1)

   and      A$\rightleftharpoons$2B                                          ......(2)

are in the ratio 9:1. If the degree of dissociation of X and A be equal, then total pressure at equilibrium (1) and (2) are in the ratio:

1. 1:9                                     

The relation for calculating pH of a solution containing weak acid and its salt is:

The equilibrium constants for the reaction,

A₂ $\rightleftharpoons$2A at 500 K and 700 K are 1x10^-10 and 1x10^-5. The given reaction is                  

(a) exothermic                    (b) slow

(c) endothermic                  (d) fast

2.c,b

3.a,d

For the chemical reaction, $3\mathrm{X}\left(\mathrm{g}\right) + \mathrm{Y}\left(\mathrm{g}\right) \rightleftharpoons {\mathrm{X}}_3\mathrm{Y}\left(\mathrm{g}\right)$;

the amount of X₃Y at equilibrium is affected by :

H₂S gas when passed through a solution of cations containing HCl precipitates the cations of the second group in qualitative analysis but not those belonging to the fourth group. It is because-          

Solubility of a gas in liquid increases on:

A solution is called saturated if:

1L of an aqueous solution contains 0.15mole of CH₃COOH (pKa = 4.8) and 0.15 mole of CH₃COONa. After the addition of 0.05 mole of solid NaOH to this solution, the pH will be

The concentration of [H⁺] and concentration of [OH^-] of a 0.1M aqueous solution of 2% ionised weak monobasic acid is                                                                    

[ionic product of water = 1x 10^-14]

The relation for calculating pH of a weak base is:

Eight mole of a gas AB₃ attain equilibrium in a closed container of volume 1 dm³ as,

2 AB₃ $\rightleftharpoons$ A₂(g) + 3B₂(g). If at equilibrium 2 mole of A₂ are present then, equilibrium constant is:

Which is Lewis base?