Name (formula not acceptable) the gas produced in the following reaction: Burning of sulphur.

Explain why chlorine turns moist starch iodide paper blue-black.

State what you observe when a piece of moist blue litmus paper is placed in a gas jar of chlorine.

For the elements sodium and phosphorous, state the following

(a) the formula of the chloride of each element,

(b) the physical state of each chloride at room temperature (i.e., solid, liquid or gas), and

(c) the nature of bonding of each chloride (i.e., ionic or covalent)