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Which of the following statements is not correct?

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Be and Mg have high ionization energy

Sulphates of Be and Mg are readily soluble in water

Both oxides of Be, Mg are less soluble in water

Be and Mg give characteristic colour to the flame

answer is A.

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Detailed Solution

Due to high ionization enthalpy. Be & Mg does not give characteristic colour to the flame. The flame energy is not sufficient to excite the $e^{-}$ in Be & Mg.

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