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What is the maximum number of emission lines when the excited electron of an H atom in n = 6 drops to the ground state?

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प्रश्न

What is the maximum number of emission lines when the excited electron of an H atom in n = 6 drops to the ground state?

संख्यात्मक
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उत्तर

When the excited electron of an H atom in n = 6 drops to the ground state, the following transitions are possible:

Hence, a total number of (5 + 4 + 3 + 2 + 1) 15 lines will be obtained in the emission spectrum.

The number of spectral lines produced when an electron in the nth level drops down to the ground state is given by `("n"("n"-1))/2`

Given, n = 6

Number of spectral lines =` (6(6-1))/2 = 15`

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अध्याय 2: Structure of Atom - EXERCISES [पृष्ठ ७०]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 11
अध्याय 2 Structure of Atom
EXERCISES | Q 2.15 | पृष्ठ ७०

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Obtain an expression for the radius of Bohr orbit for H-atom.


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Planck’s constant = 6.63 x 10-34 J-s.

Permittivity of free space = 8.85 x 10-12 C2/Nm2


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(A) – 1

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(C) 1/2

(D) – 0.5


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  3. is valid only at room temperature.
  4. predicts continuous as well as discrete spectral lines.

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