Physical Chemistry MCQ with Answers

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?

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?

Answer is:

3

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

Answer is:

6

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

Answer is:

−3 and +5

45) Oxidation number of iodine in IO₃⁻ + HI → H₂O + I₂:

Answer is:

Increases as well as decreases

Explanation:

It decreases from +5 to 0 and increases from −1 to 0.

6
7
8
9
10
11
12