Flame test is not given by :

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Solution

The correct option is C Be

Beryllium and magnesium do not give any colour to the flame test because they have a small size and very high ionization enthalpies. The energy of the flame is not sufficient to excite the electrons to higher energy levels. Hence, they do not impart any characteristic colour to the flame.
Hence option B is correct.

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Similar questions

Why do beryllium and magnesium not impart colour to the flame in the flame test?

C a^{2 +}

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