(a) Of the two gases, ammonia and hydrogen chloride, which is more dense ? Name the method of collection of this gas.
(b) Give one example of a reaction between the above two gases which produces a solid compound.
(c) Write a balanced equation for a reaction in which ammonia is oxidized by :
(i) a metal oxide,
(ii) a gas which is not oxygen.
(a) Explain the following in terms of gain or loss of oxygen with one example each :
(i) oxidation (ii) reduction
(b) When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Zine oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reation. Name (i) oxidising agent, and (ii) reducing agent, in this reaction.