1 gram mixture of NaCl and NaNO₃ is dissolved in water and treated with an excess of AgNO₃ solution. 1.43 g of precipitate is formed. Calculate percentage of sodium chloride in the mixture. [5]

[Ag = 108, Na = 23, N = 14, O = 16, Cl = 35.5].

[Dilute sulphuric acid, copper, iron, sodium, zinc, copper carbonate and sodium carbonate]

Choosing only from the list of substances mentioned above, write an equation for the reaction which you would use in the lab to obtain :

(i) Zinc carbonate

(ii) Copper sulphate

(iii) Sodium sulphate

(iv) Iron sulphate

(i) What type of reaction takes place between ethane and chlorine to form monochloroethane?

(ii) The reaction between ethene and chlorine forms only one product. Name the type of this reaction.

(iii)

1. Draw the structural formula of ethene.
2. What is the feature of the ethene structure which allows ethene to react with chlorine in the way it does?

The list of some organic compounds is given below.

Ethanol, ethane, methanol, methane, ethyne and ethene.

From the list above, name a compound :

(i) formed by the dehydration of ethanol by conc. H₂SO₄.

(ii) which will give red precipitate with ammonical cuprous chloride solution.

(iii) which forms methanoic acid on oxidation in the presence of copper at 200°C.

(iv) which has vapour density 14 and turn alkaline potassium permanganate green.

(v) which form chloroform on halogenation in the presence of sunlight.

(vi) which decolourises bromine solution in carbon tetrachloride.