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10th CBSE
IMPORTANT
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For which of the following species, Bohr theory is not applicable?

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Important Questions on Atomic Structure

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 26
If quantum number for last electron is n=3, l=0, m=0 then atomic number is
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 27
Which of the following transitions will have minimum wavelength?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 28
Planck's constant has the units of  
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 29
When the frequency of incident radiation on a metallic plate is doubled, KE of photoelectron will be
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 30
The wavelength (in nanometre) associated with proton moving at 1.0×103 m/s is
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 31
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be (h=6.6×10-34 J s)
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 32
The line spectrum of He+ ion will resemble that of
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 33
When the electron of a hydrogen atom jumps from n=4 to n=1 state, the number of spectral lines emitted is