At a certain temperature, the solubility of the salt, M_mA_n in water is s mol/L. The solubility product of the salt is

• M^mAⁿ

• (m + n)s^{m + n}

• m^mnⁿs^{m + n}

• m^mAⁿs

The conjugated base of hydrazoic acid is

• HN${}_3^{-}$

• N${}_2^{-}$

• N${}_3^{-}$

• N^3-

The pK_a value of (I) 2 - bromo propanoic acid, (II) 2-fluoro propanoic acid, (III) 3 - fluoro propanoic acid, (IV) 3- bromo propanoic acid decreases as

• I > III > IV > II

• II > IV > III > I

• I > IV > III > II

• IV > I > III > II

Which is the strongest Lewis base ?

• SbH₃

• AsH₃

• PH₃

• NH₃

Which of the following pairs will show common ion effect?

• Barium chloride + Barium sulphate

• Silver cyanide + Potassium nitrite

• Ammonium hydroxide + Ammonium chloride

• Sodium chloride + Hydrogen chloride

Which of the following is the most basic ?

The unit of equilibrium constant for the following reaction is

 $2{\mathrm{NO}}_2\left(\mathrm{g}\right) \rightleftharpoons {\mathrm{N}}_2{\mathrm{O}}_4 \left(\mathrm{g}\right)$

• mol L^-1

• L mol^-1

• mol^-1 L^-1

• equilibrium constant is unitless

398.

If the equilibrium constant for reaction (i) is 2, what is the equilibrium constant for reaction (ii)?

CO₂ $\leftrightharpoons$CO + $\frac{1}{2}{\mathrm{O}}_2 ....\left(\mathrm{i}\right)$

2CO₂ + O₂ $\rightleftharpoons$2CO₂ ...(ii)

• 1/4

• 1/2

• 1

• 2

For a gas in equilibrium with a liquid, the ratio of the concentration of the gas in the solution phase to that in the gaseous phase is constant at constant temperature, only if molecules undergo

• ionisation

• dissociation

• isolation

• reaction with solvent

Which of the following comments about the following equilibrium reaction is the most correct?

${\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right) + {\mathrm{NH}}_3\left(\mathrm{aq}\right) \rightleftharpoons {\mathrm{HSO}}_4^{-} + {\mathrm{NH}}_4^{+}\left(\mathrm{aq}\right)$

• The equilibriumlies mostly to the right

• The equilibrium lies mostly to the left

• The equilibrium is exactly in between where the concentration of each of the reactants is exactly equal to the concentration of each of the products

• The equilibrium depends on the temperature of the equilibrium reaction