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NEET levelSingle correct optionDifficulty 1 of 3qa001

In a flame test, a salt of which cation imparts an apple-green colour to the flame?

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

Answer: C

Barium salts, usually moistened with conc. HCl to form volatile

BaCl X_{2}

, colour the flame apple green. Strontium gives crimson red, calcium brick red and sodium golden yellow. The answer is

Ba X^{2 +}

.

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