MHT CET · Chemistry · s Block Elements

Which of the following is NOT true for alkaline earth metals?

A Their divalent ions have inert gas configuration
B They are more electropositive than alkali metals
C Alkaline earth metals are silvery white and soft
D Their compounds are diamagnetic and colourless

Verified Solution

Answer & Solution

Correct Answer

(B) They are more electropositive than alkali metals

Step-by-step Solution

Detailed explanation

- Alkali metals have low ionization energies and their atoms readily lose the valence electron hence they are most electropositive elements.
- Compound of alkaline earth metals are diamagnetic and colour less.

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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