CUET · CHEMISTRY · PYQ PAPER 2023
Match List I with List II.
| List-I (Compounds) | List-II (Oxidation number of Cobalt) |
| A. \(\left[ Co \left( NH _3\right)_5( NCS )\right] SO _3\) | I. \(+4\) |
| B. \(\left[ Co \left( NH _3\right)_4 Cl _2\right] SO _4\) | II. \(0\) |
| C. \(Na _4\left[ Co \left( S _2 O _3\right)_3\right]\) | III. \(+2\) |
| D. \(\left[ Co _2( CO )_8\right]\) | IV. \(+3\) |
- A A-I, B-II, C-IV, D-III
- B A-IV, B-III, C-II, D-I
- C A-IV, B-I, C-III, D-II
- D A-IV, B-II, C-III, D-I
Answer & Solution
Correct Answer
(C) A-IV, B-I, C-III, D-II
Step-by-step Solution
Detailed explanation
A. \(x + 5(0) + (-1) + (-2) = 0 \implies x = +3\) B. \(x + 4(0) + 2(-1) + (-2) = 0 \implies x = +4\) C. \(4(+1) + x + 3(-2) = 0 \implies x = +2\) D. \(2x + 8(0) = 0 \implies x = 0\) A-IV, B-I, C-III, D-II
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