IGCSE A Level Chemistry MCQs – Practice Test 7 (Chapter 20)
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MCQ 31: Nitrogen deficiency can be traced in plants by its:
MCQ 32: An environmental hazard when fertilizers leached from the fields into rivers and lakes is termed as:
MCQ 33: To stop emission of SO2 into atmosphere, the chimneys are covered with:
MCQ 34: Upon heating ammonium salts with a base, NH3(g) is given off. The nature of this gas is:
MCQ 35: When crops are harvested, the nitrogen in the harvested portions is:
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