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


Question 2
(b) The metal zinc is extracted from the ore zinc blende:

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38.

 (i) Name the zinc compound in zinc blende.
 

39.

 (ii) Zinc blende when roasted in air gives off a gas which, if allowed to escape, would constitute an atmospheric pollutant.What is this gas?
 

40.

 (iii) What particular polluting effect does this gas have?
 


 
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ICSE Board Class X Solved Exam Question Papers
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