O Level Chemistry MCQs – Certification Test 22

Redox Reactions MCQs (Question 22) – Study App & e-Book Download

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MCQ 22: If acidified Potassium Dichromate(VI) (K₂Cr₂O₇) acts as oxidizing agent, color changes from:

orange to red
orange to green
yellow to green
yellow to red

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O Level Chemistry MCQs App & e-Book – Redox Reactions Admission Tests

Redox Reactions Test 33

Mass Volume Time and Temperature Test 34

Protons Neutrons and Electrons Test 35

Mineral Acids and General Properties Test 36

Transfer of Electrons Test 37

Atomic Mass Test 38

Electrolyte and Non Electrolyte Test 39

Polarization Test 40

O level Chemistry and States of Matter Test 41

Free Redox Reactions Study App – Download from App Store & Play Store

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