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Number of metal ions characterized by flame test among the following is _________. Sr 2 + , Ba 2 + , Ca 2 + , Cu 2 + , Zn 2 + , Co 2 + , Fe 2 +

Correct answer

0

Step-by-step solution

The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic colour the salt turns the flame of a Bunsen burner. The heat of the flame excites the electrons of the metal ions, causing them to emit visible light. Sr 2 + - Crimson red colour Cu 2 + - Blue green colour Ca 2 + - Brick red colour Ba 2 + - Pale green colour Hence, the answer is 4 .

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