Chemistry-Oxidation Number
NEET Chemistry Oxidation Number Match the Following Question
Type: Match the Following-match the column-Hard-Class 11
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Oxidation number of an element in free state | (i) Zero |
| (b) Oxidation number in carbonate ion (CO3)2– | (ii) Charge on the ion |
| (c) Highest oxidation number of representative elements | (iii) Group number |
| (d) Oxidation number of transition elements | (iv) Several positive oxidation states |
A
a-i, b-ii, c-iii, d-iv
B
a-ii, b-i, c-iv, d-iii
C
a-iv, b-iii, c-i, d-ii
D
a-iii, b-iv, c-ii, d-i
Correct Answer
Option A
Detailed Explanation
The oxidation number of an element in its free state is indeed zero (a-i). For the carbonate ion, its oxidation number must equal the charge on the ion (b-ii). The highest oxidation number for representative elements corresponds to their group number (c-iii). Transition elements can exhibit several positive oxidation states (d-iv), confirming the correct pairs in option A.
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