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D and F Block Elements question

2023 · 6 Apr · Shift 2 · Q7
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  5. /2023 · 6 Apr · Shift 2 · Q7

D and F Block Elements question

2023 · 6 Apr · Shift 2 · Q7

JEE MainChemistryD and F Block ElementsMCQ+4 / −1
Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R" Assertion A : In the complex Ni(CO)4\mathrm{Ni}(\mathrm{CO})_{4}Ni(CO)4​ and Fe(CO)5\mathrm{Fe}(\mathrm{CO})_{5}Fe(CO)5​, the metals have zero oxidation state. Reason R : Low oxidation states are found when a complex has ligands capable of π\piπ-donor character in addition to the σ\sigmaσ-bonding. In the light of the above statements, choose the most appropriate answer from the options given below
  1. A
    A is not correct but R is correct
  2. B
    A is correct but R is not correct
  3. C
    Both A and R are correct but R is NOT the correct explanation of A
  4. D
    Both A and R are correct and R is the correct explanation of A
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