Q
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
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A
A. Smaller electronegativity of alkali metals
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B
B. Smaller ionic radius of these metals
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C
C. De-excitation of electrons from higher energy levels to low energy level
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D
D. Excitation of electrons from low energy levels to higher energy levels
Correct Answer:
C. C. De-excitation of electrons from higher energy levels to low energy level
