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Which of the following imparts green/apple green colour to the Bunsen flame ?

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Which of the following imparts green/apple green colour to the Bunsen flame ?
A. Calcium chloride
B. Volatile boron trifluoride
C. Barium chloride
D. Ethoxy borate
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Correct Answer - B::C::D
`BF_(3)` colour the flame green, `B(OC_(2)H_(5))_(3)` burns with green edged flame, Barium chloride (volatile)gives apple green colour to flame.
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