IGCSE O Level Chemistry MCQs – Practice Test 16 (Chapter 1)
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MCQ 76: A poisonous gas released in exhaust fumes is:
MCQ 77: Basic oxides neutralize:
MCQ 78: Consider the equation ZnO + NaOH + H2O → Na2Zn(OH)4. Moles of NaOH required to balance the equation would be:
MCQ 79: H2SO3 is the formula of:
MCQ 80: Most metals react with acids to form:
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