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Q.

A brick red colour is imparted to Bunsen flame by a :

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a

Ca salt

b

Co salt

c

Sr salt

d

Na salt

answer is A.

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Detailed Solution

A brick red colour is imparted to the Bunsen flame by a calcium salt.

 The brick's red colour is produced by calcium metal in flame. It is caused by the thermal energy's excitation of electrons, which is followed by the de-excitation of an electron to its ground state and the release of visible light.

 Hence, the option A is correct.

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