ICSE 1998 : SCIENCE Paper 2 (Chemistry) - Question 3(b) Answer the following.

SCIENCE
Paper 2 (Chemistry) - 1998
(One hour and a half)

Question 3
(b) Industrially, ammonia is obtained by direct combination between nitrogen and hydrogen.

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48.
(i)Write the correctly balanced equation for the direct combination of nitrogen and hydrogen.

49.
(ii) Which of the metals-iron, platinum, copper-catalyse this direct combination?

50.
(iii) Is the formation of ammonia promoted by the use of high pressure or low pressure?

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