IGCSE O Level Chemistry Competitive Exam MCQs – Mock Test 19

Atoms and Elements Notes Questions with Answers PDF Download – Test 19

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Atoms & Elements MCQs – Mock Test 19 PDF Download

MCQ 91: Symbol of Magnesium is:

MCQ 92: In Universal indicators, a pH of 7 is shown with:

yellow color
green color
blue color
pink color

MCQ 93: The formula of copper carbonate is:

CuCO₃
CuCO₂
CuCHO₃
CuCOH

MCQ 94: Old paintings can be restored through an oxidizing agent:

H₂S
H₂O₂
H₂PO₄
H₃O

MCQ 95: Weak electrolytes include which of the following?

limewater Ca(OH)₂
ammonia solution NH₃
Carbonic acid H₂CO₃
all of above

IGCSE O Level Chemistry Notes App & eBook – Atoms & Elements Competitive Exam

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