Antichlor is a compound which removes chlorine form a material.

The compound which does not exist as hydrate form

Ammonia reacts with excess of chlorine to form

Name the compound which can be oxidised to chlorine.

Chlorine is used to purify drinking water. Excess of chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water.

Valency is the number of hydrogen atoms which can combine with (or displace) one atom of the element (or radical] forming a compound'. With reference to the above definition of valency, state the valency of chlorine in hydrogen chloride, giving reasons.

The compound which is not formed on heating Be(NO_3)_2 is

A substance used to remove excess of chlorine.

Name an organic compound which is : used for making a household plastic material.

Silicon (Si = 28) forms a compound with chlorine (Cl = 35.5) in which 5.6 g of silicon is combined with 21.3 g of chlorine. Calculate the empirical formula of the compound. [Hint. Total mass of silicon and chlorine in the compound = 5.6 + 21.3 = 26.9 % age of Si =(5.6)/(26.9)xx100 and %age of Cl =(21.3)/(26.9)xx100