IGCSE A Level Chemistry Competitive Exam MCQs – Practice Test 5 (Chapter 20)
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MCQ 21: The cost of apparatus which can withstand high pressures above 30,000 kPa is extremely:
MCQ 22: Nitrogen always exists as:
MCQ 23: Nucleic acids and chlorophyll are synthesized by the help of:
MCQ 24: Ammonia gas is produced by heating ammonium salt with:
MCQ 25: In the contact process, a pressure used is just above:
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