If K_sp of Ag₂CO₃ is 8 $$ \times $$ 10^–12, the molar solubility of Ag₂CO₃ in 0.1 M AgNO₃ is -

For a reaction consider the plot of $$\ell $$n k versus 1/T given in the figure. If the rate constant of this reaction at 400 K is 10^–5 s^–1, then the rate constant at 500 K is –

The upper stratosphere consisting of the ozone layer protects us from sun's radiation that falls in the wavelength region of -

The combination of plots which does not represent isothermal expansion of an ideal gas is –