Question

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Answer 1

Answer:

Explanation:

Water insoluble

substances

1 g of the sample dissolves completely in 20 ml of water and gives a clear

solution

Ammonium salts Heat 1 g of the sample in a test tube. No odour of ammonia is detected.

Lead (Vol. 4) Not more than 2 mg/kg

Determine using an atomic absorption technique appropriate to the

specified level. The selection of sample size and method of sample  

preparation may be based on the pr