
Chemistry multiple-choice(Topic: Redox reactions)
Flashcard
•
Chemistry
•
12th Grade
•
Hard
Lai Cheung
FREE Resource
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10 questions
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1.
FLASHCARD QUESTION
Front
Possible material to make metal Y: Magnseium, Zinc, Nickel, Silver
Back
Silver
2.
FLASHCARD QUESTION
Front
In which of the following cases will there be electrons flowing in the external circuit? Options: Anode: Zinc ;Cathode: Copper; electrolyte: sugar solution, Anode: Copper ;Cathode: Copper; electrolyte: salt solution, Anode: Zinc ;Cathode: Copper; electrolyte: NaCl solution, Anode: Copper ;Cathode: Copper; electrolyte: NaCl solution
Back
Anode: Zinc ;Cathode: Copper; electrolyte: NaCl solution
3.
FLASHCARD QUESTION
Front
Oxidation number change of chromium (Cr) in the reaction of chromite (FeCr2O4) with sodium carbonate in the air.
Back
+2 to +6
4.
FLASHCARD QUESTION
Front
Consider the ionic equation of a redox reaction: 2MnO4-(aq) + xH+(aq) + yH2S(aq) -> 2Mn2+(aq) + zH2O(l) + yS(s). What is the value of y?
Back
5
5.
FLASHCARD QUESTION
Front
Back
6.
FLASHCARD QUESTION
Front
Back
(1) and (3) only
7.
FLASHCARD QUESTION
Front
Which process will NOT produce a gas at the anode?\n- Electrolysis of silver nitrate solution using silver electrodes\n- Electrolysis of dilute sulphuric acid using platinum electrodes\n- Electrolysis of dilute sodium chloride solution using carbon electrodes\n- Electrolysis of concentrated sodium chloride solution using mercury cathode and carbon anode
Back
Electrolysis of silver nitrate solution using silver electrodes
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