O Level Chemistry Exam Prep
O Level Chemistry Practice Test 92
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MCQ: In Calcium Chloride, the percentage composition of Calcium is
MCQ: Products of reaction CuO + HNO3 → are
MCQ: Extra stability is gained in the third shell if the number of electrons is
MCQ: Many catalysts are
MCQ: Consider the equation ZnO + NaOH + H2O → Na2Zn(OH)4. Moles of H2O required to balance the equation would be
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