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WAEC Chemistry 2010 Paper

Question : 37

Total: 38

Which of the following substances cannot be classified as a heavy chemical?

Solution:

Concept:

Heavy chemicals are produced in bulk on a large scale and are relatively inexpensive.

Explanation:

\mathrm{CaO}

(quicklime),

\mathrm{CaOCl_2}

(bleaching powder), and

\mathrm{H_2SO_4}

(sulphuric acid) are all manufactured in huge quantities for industrial use.

\mathrm{AgNO_3}

(silver nitrate) is prepared in smaller amounts and is costly, so it is a fine chemical, not a heavy chemical.

Answer:

\mathrm{AgNO_3}

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