Sodium chloride imparts a golden yellow colour to the Bunsen flame. This can be interpreted due to

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low ionization potential of sodium

photosensitivity of sodium

sublimation of metallic sodium to give yellow vapour

emission of excess of energy absorbed as a radiation in the visible region

answer is D.

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Detailed Solution

IA group elements and their compounds imparts colour to the bunsen flameReason:When the compound of these elements are placed on the bunsen feame, they absorbs the energy and undergoes excitationWhen the excited electron return back to the ground state, they emits the excess energy in the form of readiation,Which falls in the visible region. That emitted radiation colour only the colour of the flame.In case of NaCl the emitted radiation colour is golden yellow and hence the colour imparted to the flame is golden yellow

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