JEE Main · 2011 · 10 Apr 2011 · Offline · Equilibrium

The first and second ionization constants of ${\mathrm{H}}_2\mathrm{X}$ are $2.5\times 10^{-8}$ and $1.0\times 10^{-13}$ respectively. The concentration of ${\mathrm{X}}^{2-}$ in $0.1\mathrm{M}$ ${\mathrm{H}}_2\mathrm{X}$ solution is $\_\_\_\_$ $\times 10^{-15}\mathrm{M}$. (N …

Which of the following mixture gives a buffer solution with $\mathrm{pH}=9.25$ ?
Given : ${\mathrm{pK}}_{\mathrm{b}}\left({\mathrm{NH}}_4\mathrm{OH}\right)=4.75$

Consider the general reaction given below at 400 K

The values of $K_p$ and $K_c$ are studied under the same condition of temperature but variation in x and y.
(i) $K_p=85.87$ and $K_c=2.586$ appropriate units
(ii) $K_p=0.862$ and …

For the following gas phase equilibrium reaction at constant temperature,

If the total pressure is $\sqrt{3}$ atm and the pressure equilibrium constant ($K_p$) is 9 atm, then the degree of dissociation is given as …

${\mathrm{X}}_2(\mathrm{g})+{\mathrm{Y}}_2(\mathrm{g})\rightleftharpoons 2\mathrm{Z}(\mathrm{g})$
${\mathrm{X}}_2(\mathrm{g})$ and ${\mathrm{Y}}_2(\mathrm{g})$ are added to a 1 L flask and it is found that the system attains the above equilibrium at …

Consider three metal chlorides $\mathrm{x},\mathrm{y}$ and z , where x is water soluble at room temperature, $y$ is sparingly soluble in water at room temperature and z is soluble in hot water. $\mathrm{x},\mathrm{y}$ and z are respectively