IGCSE A Level Chemistry Certification MCQs – Practice Test 11 (Chapter 20)
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MCQ 51: The waxy layer of plants are attacked which increases water loss hence making it prone to pest and bacteria which is due to:
MCQ 52: Most harmful effects of Acid Rain is on:
MCQ 53: Nitrogen-based fertilizer formed from ammonia and nitric acid is:
MCQ 54: Nitrogen makes up 78% of the earth's atmosphere and is:
MCQ 55: Hydrogen is also obtained as a by-product of cracking of heavy fractions from:
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