(i) Choose the correct answer from the list given below:
[zinc blende, C₂H₂, calamine, CH, haematite]
(a) The ore which can be concentrated by magnetic separation.
(b) Empirical formula of Ethyne.

(ii) Give balanced equation for the following reactions:
(a) Copper reacts with concentrated Nitric acid.
(b) Aluminium nitride is treated with warm water.

(iii) Match the salts underlined in Column A with the most suitable method of preparation given in Column B.


(iv) Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
(a) Give balanced chemical equation for the above reaction.
(b) State the method of collection of the gas formed above.
(c) What is the property of sulphuric acid that makes it a suitable reagent for the reaction?

Solution

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