IGCSE O Level Chemistry MCQs – Practice Test 1 (Chapter 11)

Redox Reactions MCQs with Answers PDF Download – Test 1

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Learn "Redox Reactions MCQs" App Download with MCQ: If acidified Potassium Dichromate(VI) (K₂Cr₂O₇) acts as oxidizing agent, color changes from; with answers: orange to green, orange to red, yellow to green, and yellow to red. Solve Acids: Properties & Reactions Quiz Questions, download Google e-Book (Free Chapter) to maximize chemistry digital advancement.

Redox Reactions MCQs with Answers PDF Download: MCQ Quiz 1

MCQ 1: 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

MCQ 2: In an acidified solution of Potassium Dichromate(VI) (K₂Cr₂O₇), Dichromate ion (Cr₂O₇^-2) becomes reduced to:

Chromate (V) ions
Chromium (III) ions
Chromium (II) ions
Chromium (VI) ions

MCQ 3: Which of the following is involved in oxidation?

loss of hydrogen
loss of oxygen
gain in hydrogen
gain in electrons

MCQ 4: In a reaction between CuSO₄_(s) and Zn_(s),:

Zinc experiences an increase in the oxidation state
Zinc experiences a decrease in the oxidation state
Zinc undergoes reduction
none of above

MCQ 5: Old paintings became decolorized due to:

Lead Sulphide PbS
Lead Sulphate PbSO₄
Lead Chloride PbCl₂
Lead Oxide PbO

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