IGCSE O Level Chemistry Certification Exam Tests
IGCSE O Level Chemistry Practice Test 88
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MCQ 436: The first element in the periodic table to have 8 valence electrons in the third shell is
MCQ 437: Exothermic reactions do not include
MCQ 438: What is true about mineral acids?
MCQ 439: What is true about Brass?
MCQ 440: While forming soluble salts, acid is added to the metal until there is no more
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