The sulphate of which metal given below has the highest solubility in water?

C a

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B a

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S r

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M g

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Solution

The correct option is D $M g$
On moving down the group of alkaline earth metals, the solubility of metal sulphates decreases. Also, the ionic size increases and hydration energy of metal ion decreases. Hence, magnesium sulphate( $M g S O_{4}$ ) has lowest solubility.

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M

M S O_{4}

M (O H)_{2}

M O

N a O H

M

M S O_{4}

M (O H)_{2}

B e > M g > C a > S r > B a

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