(i) (a) Ranjana wants to prove that ammonia is a reducing agent. To demonstrate this, she passes ammonia gas over heated copper oxide. What will she observe? (b) Write a balanced chemical equation for the above reaction.
(ii) Name the alloy which is made up of: (a) Copper, Zinc and Tin (b) Lead and Tin
(iii) Seema takes a blue crystalline salt P in a test tube. On heating it produces a white anhydrous powder. P is dissolved in water. Zinc is added to one part of the solution and to another part of the solution Barium chloride is added. (a) Name the compound P. (b) Mention one observation when zinc is added to the solution of P. (c) State the colour of the precipitate formed when barium chloride is added to the solution of P.
(iv) Give reasons: (a) Ethene undergoes addition reaction. (b) Hydrocarbons can be used as fuels. (c) Hydrogen chloride gas cannot be collected over water.
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