Which of the following is incorrect statement :

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Solubilities of alkaline earth metal fluorides and hydroxides generally increase down the group.

Hydration energies of alkali metal halides decrease down the group with increase in size of cations.

Mg 2+ ion is bigger than Li + .

BeCl 2 is easily hydrolysed in water.

Text Solution

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The correct answer is:

Factual

Hydration energy ∝ .

Both are diagonally related ; because of more positive charge on Mg, Mg 2+ is smaller than Li + .

Li + = 76 pm, Mg 2+ = 72 pm.

Salt of weak base and strong acid, thus easily hydrolysed in water giving acidic solution.

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