One of the following statements is incorrect

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Elements of group 2 are good conductors of electricity and heat

Compounds of group 2 elements are dimagnetic in nature

The salts of group 2 elements are more heavily hydrated than those of elements of group I

Elements of group 2 are more electropositive than group I elements

answer is D.

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Detailed Solution

2^nd group elements are good metals and hence they are good conductors of heat and electricity
Compounds of group 2 diamaganetic in nature since they can't contain unpaired electrons
Eg : MgCl₂ [Total number of valency electron = 2 + 2[7] = 16]

Extent (or) degree of hydration increases
A group salts are more heavily hydrated than IA group salts
SO, Option 1,2,3 are correct

Effective nuclear charge increases, Nuclear force of attraction on valency electron increases
Electron losing tendency decreases and hence electropositivity decreases ie., electropositivity order IA > IIA

4^th option is incorrect

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