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Q.

Which of the following statements about alkaline earth metals are correct ? 
(i) Hydration energy of Sr2+ is greater than that of Be2+
(ii) CaCO3 decomposes at a higher temperature than BaCO3
(iii) Ba (OH)2 is stronger base than Mg (OH)2
(iv) SrSO4 is less soluble in water than CaSO4
Select the correct answer using the code given below

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a

(i) and (iii)

b

(iii) and (iv)

c

(ii) and (iii)

d

(i) and (iv)

answer is A.

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Detailed Solution

Hydration energy is directly proportional () to ϕ (polarising power) of cation.

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