Define pH.

Define capacitance of a capacitor. Define the SI unit of capacitance.

(a) Define mineral. (b) Define Ore.

Identify the colour changes in pH paper when a drop of a sample, which has pH 14 in standard pH colour chart is placed on it.

Write the formulae and Choose the pH pH 7, pH=7 Sodium chloride

Write the formulae and Choose the pH pH 7, pH=7 Sodium acetate

Write the formulae and Choose the pH pH 7, pH=7 Aluminium chloride

Equal volumes of two HCl solutions of pH=3 and pH=5 were mixed. What is the pH of the resulting solution ?

Write the formulae Choose the pH pH 7, pH=7 Sodium hydrogen carbonate

Bond angle in (PH_4)^+ is higher than that in PH_3 . Why?