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If radius of first orbit in hydrogen ato...

If radius of first orbit in hydrogen atom is `0.53Å`, then what will be the radius of fourth orbit?

A

`0.193Å`

B

`4.24Å`

C

`2.12Å`

D

`8.48Å`

Text Solution

Verified by Experts

The correct Answer is:
D
`r_(n)propn^(2)`
`:.(r_(1))/(r_(2))=(n_(1)^(2))/(n_(2)^(2))`
`:.r_(2)=(n_(2)^(2))/(n_(1)^(2)).r_(1)=(4^(2))/(1^(2)).(0.53)`
`:.r_(2)=(16)/(1)(0.53)=8.48Å`
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KUMAR PRAKASHAN-ATOMS-Section-D (Multiple Choice Questions (MCQs)) (MCQs From .DARPAN Based On Textbook) (Bohr Model of Hydrogen Atom )
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  5. If the radius of the second orbit in hydrogen atom is R then radius of...

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  6. The ratio of first three Bohr radii is ………..

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  9. When electron in hydrogen is in minimum excited state then its radius ...

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  10. the ratio of the radii of n = 10 orbit of hydrogen and Li^(+2) ion is ...

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  11. in which of the following system will the radius of the second orbit b...

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  12. Out of following which will have minimum first orbital radius?

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  13. According to Bohr model, energy of electron in n^(th) orbit is ...... ...

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  14. The ratio of energies of electron in the first excited state to its se...

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  15. The velocity of electron v in the second orbit of hydrogen, then its v...

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  16. In a hydrogen atom, the centripetal force is furnished by the coloumb ...

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  17. The angular speed of the electron in the n^(th) Bohr orbit of the hydr...

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  18. The linear speed of the electron in the nth Bohor orbit of the hydroge...

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  19. How much energy is required to send the electron at infinite distance ...

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  20. Linear momentum of electron revolving in n^(th) orbit of atom p=(nh)/(...

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