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GS
GS Set-1
Chemistry
Physical Chemistry
40

Physical Chemistry MCQ with Answers

40) Equivalent weight of KMnO₄ in alkaline medium is equal to: (M = molar mass)

M

M⁄2

M⁄3

M⁄5

Answer is:

M

Explanation:

In alkaline medium, MnO₄⁻ → MnO₄²⁻

Physical Chemistry MCQ with Answers

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Related Physical Chemistry MCQ with Answers

41) Oxidation numbers of A, B and C are +6, −2 and −1 respectively. What will be the formula of the molecule when A, B and C associate with each other?

AB₂C₂

ABC₂

AB₂C

A₂BC

Answer is:

AB₂C₂

Explanation:

The total number of positive and negative charges should be zero in the compound.

42) One mole of X₂H₄ releases 10 moles of electrons to form a compound Y. What should be the oxidation number of X in the compound Y?

3

−3

−6

1

Answer is:

3

43) What should be the oxidation number of S in H₂S₂O₇?

5

6

4

7

Answer is:

6

44) Oxidation numbers of the two nitrogen atoms present in ammonium nitrate are respectively:

+3 and +3

0 and 0

−3 and +5

−1 and −1

Answer is:

−3 and +5

Physical Chemistry MCQ with Answers

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