Redox Reactions :D
5 Questions
| Attempts: 294
A quiz with 5 MCQ questions on redox reactions
Questions and Answers
- 1.
The reaction between mangananese metal (Mn) and dilute acid is shown by the following ionic equation: Mn(s) + 2H+ (aq) --> Mn2+ (aq) + H2 (g)Which one of the following shows the change in oxidisation state of the hydrogen in this reaction?
- A.
+1 to 0
- B.
0 to +1
- C.
+2 to 0
- D.
+2 to +1
Correct Answer
A. +1 to 0 -
- 2.
Which of the following underlined atoms are reduced?(i)PbCl2 + Cl2 --> PbCl4(ii)NaOH + HCl --> I2 + 5SO42- + 3H + H20(iii)2IO3- + 5HSO3- --> I2 + 5SO42- + 3H+ + H2O(iv)Cu+1/2O2 --> CuO
- A.
I and iv
- B.
Ii and iii
- C.
Iii and iv
- D.
I, ii and iii
- E.
I, ii, iii and iv
Correct Answer
C. Iii and iv -
- 3.
Which reagent is used to test for oxidising agents?
- A.
Acidified dichromate(VI) solution
- B.
Potassium iodide solution
- C.
Iodine Solution
- D.
Acidified potassium manganate (VII) solution
Correct Answer
B. Potassium iodide solution -
- 4.
In electrolysis, Oxidisation always takes place
- A.
At the cathode
- B.
At the anode
- C.
At both electrodes
- D.
Between the two electrodes
Correct Answer
B. At the anode -
- 5.
A reducing agent can
- A.
Give oxygen to another substance
- B.
Decrease the oxidisation state of another substance
- C.
Take hydrogen from another substance
- D.
Take electrons from another substance
Correct Answer
B. Decrease the oxidisation state of another substance -
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Current Version
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Jan 11, 2013Quiz Edited by
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Apr 23, 2010Quiz Created by
Chenapok
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