NEET 2010 Chemistry question

Not in JEE Main or NEET syllabus

Property of the alkaline earth metals that increases with their atomic number:

(1)Solubility of their hydroxides in waterCorrect
(2)Solubility of their sulphates in water
(3)Ionization energy
(4)Electronegativity

Answer: (1)

Solution

Down group 2 (Be to Ba): Ionisation energy decreases (larger atoms), so (3) is wrong. Electronegativity decreases, so (4) is wrong. Solubility of the sulphates decreases ( and are very soluble, is insoluble) because the lattice enthalpy stays nearly constant

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Question ID VK-090537