Which of the following is least soluble?

B e F_{2}

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S r F_{2}

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C a F_{2}

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M g F_{2}

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Solution

The correct option is B $S r F_{2}$
Here the option (B) $S r F_{2}$ is correct, Which is least soluble.
Hydrogen energy decreases down the group, so solubility with the water decreases down the group.
Solubility in the order $B e > M g > C a > S r > B a$

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H_{2} O

M g F_{2}, C a F_{2}, A g F

Which of the following is least soluble in $H_{2} O$ ?

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