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Q.

Which of the following cation will turn blue in oxidizing flame?

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a

${Co}^{2 +}$

b

${Cr}^{3 +}$

c

${Ni}^{2 +}$

d

${Fe}^{3 +}$

answer is A.

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Detailed Solution

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An oxidizing flame is one that has more oxygen than it needs and can oxidize objects that come into touch with it.

As the amount of oxygen rises, the flame that burners create will become shorter and darker in colour. Hisses and roars are also produced as the oxygen level rises.

An oxidizing flame is one that is hotter, whereas a reducing flame is one that is relatively less hot.
Question Image will turn into a blue flame in the oxidizing flame. While burning it produces an excessive amount of heat in the form of oxygen.
Hence, the correct answer is .

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