Define gram equivalent mass of an element.

How does ionisation energy vary in a group?

Ice is less dense than water at O°C. Justify this statement.

The hydroxides and carbonates of sodium and potassium are easily soluble in water while the corresponding salts of magnesium and calcium are sparingly soluble in water. Explain

Most aeroplanes cabins are artificially pressurized. Why?

The equilibrium constant for a reaction is one or more if \(\Delta G^{\ominus}\) for it is less than zero. Explain.

What is K_H in P_solute= K_H X_solute?On what does the value of K_H depend ?

Predict the shapes and hybridisation of the following molecules CO₂

What is catenation?

Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium extract for testing sulphur by lead acetate test?