Class XI Chemistry Atomic Structure 2

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Question 1

If the series limit of wavelength of Lyman series for the hydrogen atom is 912 Å,then the series limit of wavelength for Balmer series of hydrogen atom is

• A912 Å
• B912*2 Å
• C912*4 Å
• D912/2 Å

Question 2

If the angular momentum of an electron changes from 2h/π to h/π during a transition in a hydrogen atom, it results in formation of spectral lines in

• AUV region
• BVisible region
• CIR region
• DFar IR region

Question 3

what was not the serious drawback of Rutherford’s nuclear model of an atom ?

• Acould not explain the overall stability of atom
• Bcould not explain that all elements give a characteristic line spectra
• C inability to describe the distribution of electrons and energies of electrons
• Dcould not explain overall neutrality of an atom.

Question 4

If the radius of first Bohr orbit is x, then the de-broglie wavelength of electron in 3^rd orbit is nearly

• A2πx
• B6πx
• C9x
• Dx/3

Question 5

A photon of 400 nm is absorbed by a gas and re-emits two photons. One re-emitted photon has wavelength 500 nm the other photon has wavelength(in nm) of

• A2000
• B200
• C5000
• D20000

Question 6

Consider the following sets of quantum numbers:
Which of the below setting is not permissible arrangement of electrons in an atom?

• Aa)
• Bb)
• Cc)
• Dd)

Question 7

In an excited state, a calcium atom has the electronic configuration 1s²2s²2p⁶3s²3p⁶4s¹4d¹. What is the orbital angular momentum for d electron?

• A h/2 π
• B h/2 π
• C h/2 π
• D h/2 π

Question 8

Which of the following set of quantum numbers represents the highest energy of an atom?

• A
• B
• C
• D

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