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BITSAT 2018
Exam
BITSAT
Year
2018
Subject
Chemistry
Chapter
s Block Elements

BITSAT 2018 · Chemistry · s Block Elements

Which of the following property of alkaline earth metal increases...

Which of the following property of alkaline earth metal increases with their atomic number?

Options

  1. Aelectronegativity
  2. Bsolubility of their hydroxides in water
  3. Csolubility of their sulphate in water
  4. Dionisation energy

Correct answer

B. solubility of their hydroxides in water

Step-by-step solution

The lattice energy of the hydroxides of alkaline earth metal decreases more rapidly than their hydration energy leading to more negative value of ΔHsol{ΔH}_{sol} down the group. More negative is ΔHsol{ΔH}_{sol}, more is the solubility of compounds. Hence the solubility of hydroxides of alkaline earth metal increases with their atomic number.
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