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Solution


Q.

The number of the following statement/s which is/are incorrect is ________.                  [2023]

(A) Line emission spectra are used to study the electronic structure.

(B) The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet.

(C) An absorption spectrum is like the photographic negative of an emission spectrum.

(D) The element helium was discovered in the sun by spectroscopic method.

Ans.

(1)

Emission spectrum of an atom is discrete spectrum.