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NEET levelSingle correct optionDifficulty 1 of 3sb032

In a flame test, which ion imparts an apple-green colour to the flame?

A $Ca X^{2 +}$
B $Sr X^{2 +}$
C $K X^{+}$
D $Ba X^{2 +}$

Answer: D

Barium salts give an apple-green flame. Calcium gives brick-red, strontium crimson-red and potassium lilac (violet).

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