The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order
K₂CO₃ (A), MgCO₃ (B), CaCO₃ (C), BeCO₃ (D)

Explain the difference in the nature of bonding in LiF and LiI.

The molar volume of liquid benzene (density = 0.877 g mL^-1) increases by a factor of 2750 as it vaporises at 20^oC and that of liquid toluene (density = 0.867 g mL^-1) increases by a factor of 7720 at 20^oC. A solution of benzene and toluene at 20^oC has vapour pressure of 46.0 Torr. Find the mole fraction of benzene in the vapour above the solution.

The standard reduction potential for Cu²⁺|Cu is +0.34 V. Calculate the reduction potential at pH = 14 for the above couple. K_sp of Cu(OH)₂ is 1.0 $$\times$$ 10^-19