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MDCAT Past Papers /
SZABMU /
Chemistry /
Chap No 7 /
Quiz 1

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MDCAT Past Papers - SZABMU - Chemistry - Chap No 7 Quiz

Attempt 10 MCQs on MDCAT Past Papers - SZABMU - Chemistry - Chap No 7 | Quiz 1

1. Oxidation number of an element in free state is:

Negative
Positive
Zero
1

2. The branch of science which deals with the conversion of electrical energy into chemical energy and vice versa is called:

Electrochemistry
Thermochemistry
Stereochemistry
Biochemistry

3. In the reaction: Cr₂O₇²⁻ + 14H⁺ → 2Cr³⁺ + 7H₂O How many electrons are gained or lost by each chromium atom?

+12e
+3e
+6e
-6e

4. The oxidation number of oxygen in Na₂O₂ is:

-1
2
-2
1

5. The oxidation number of oxygen in NaO₂ is:

-1
2
-2
1

6. During electrolysis of concentrated aqueous solution of NaCl, which ion is NOT discharged at cathode?

Na⁺
Cl⁻
H⁺
OH⁻

7. Which statement correctly describes the standard electrode potential?

It is the electrode potential determined at room temperature and pressure
It is the electrode potential determined under standard conditions using standard hydrogen electrode as the other electrode
It is the electrode potential of an element and its solution compared to a standard value
It is the potential which is measured when two half cells are connected together

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