MHT CET · Chemistry · d and f Block Elements

Which from following statements regarding transition elements is NOT CORRECT?

A These exhibit properties between 's' and 'p' block elements.
B These form cations with incomplete d-subshell.
C 5d series consists of all elements from lanthanum to mercury of periodic table.
D These are arranged in four different ' \(d\) ' series.

Verified Solution

Answer & Solution

Correct Answer

(C) 5d series consists of all elements from lanthanum to mercury of periodic table.

Step-by-step Solution

Detailed explanation

\(5 \mathrm{~d}\) series consists of elements \(\mathrm{La}\), and from \(\mathrm{Hf}\) to \(\mathrm{Hg}\).

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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