s-block element which cannot be qualitatively confirmed by the...

s-block element which cannot be qualitatively confirmed by the flame test is

Options

A $Li$
B $Na$
C $Rb$
DBe

Correct answer

D. Be

Step-by-step solution

The electrons in beryllium and magnesium are too strongly bound to get excited by flame. Hence, these elements do not impart any colour to the flame. The flame test for Ca, Sr and Ba is helpful in their detection in qualitative analysis and estimation by flame photometry.

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