TS EAMCET · Chemistry · Coordination Compounds

Which of the following is not correct?

A Chlorophyll is responsible for the synthesis of carbohydrates in plants
B The compound formed in the addition of oxygen to haemoglobin is called oxyhaemoglobin
C Acetyl salicylic acid is known as aspirin
D The metal ion present in vitamin \(\mathrm{B}_{12}\) is \(\mathrm{Mg}^{2+}\)

Verified Solution

Answer & Solution

Correct Answer

(D) The metal ion present in vitamin \(\mathrm{B}_{12}\) is \(\mathrm{Mg}^{2+}\)

Step-by-step Solution

Detailed explanation

Vitamin \(B_{12}\) or cyanocobalamine contains cobalt and not magnesium.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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