JEE PHYSICS MCQ: ATOMS

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Statement I: The different lines of emission spectra (like Lyman,Balmer, etc) of atomic hydrogen gas are produced by different atoms.
Statement II: The sample of atomic hydrogen gas consists of millions of atoms.

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Correct option: B

Statement I is true; Statement II is true; Statement II is not the correct explanation for Statement I

Option D (Statement I is true; Statement II is true; Statement II is not the correct explanation for Statement I) is correct because different lines are produced by different atoms, and the sample consists of millions of atoms, but the latter doesn't explain the former.

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The de-Broglie wavelength of an electron in the first Bohr orbit is The volume occupied by an atom is greater than the volume of the nucleus by a factor of about For a hydrogen atom, when electron jump from

n

=2

{n}=1

, then wave length of radiation emitted found to be

\lambda_0

. Then, for which transition of electron of a 'He' atom, the wavelength of radiation emitted will be equal to '

\lambda_0

'. Energy of characteristic X-ray is a consequence of Taking Rydberg’s constant

{R_H} = 1.097\,\, \times \,\,{10^7}\,\,m

, first and second wavelength of Balmer series in hydrogen spectrum is When hydrogen atom is in its first excited level, its radius is its ground state radius