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Which of the following are incorrectly matched tor microcosmic bead test?

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Basic Radical	Oxidising flame		Reducing flame
	cold		hot
${Cu}^{2 +}$	Blue	Green	Red opaque	Colourless

Basic Radical	Oxidising flame		Reducing flame
	cold		hot
${Ni}^{2 +}$	Red	Violet	Green	Green

Basic Radical	Oxidising flame		Reducing flame
	cold		hot
${Mn}^{2 +}$	Arnethys	Pale violet	Colourless	Colourless

Basic Radical	Oxidising flame		Reducing flame
	cold		hot
${Co}^{2 +}$	Blue	Blue	Blue	Blue

answer is B.

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Detailed Solution

For microcosmic bead test the colur of the oxidizing and reducing flame for the nickel is yellow-brown and grey respectively.

Hence correct option is B

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