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(A) electrons int the atom are held due ...

(A) electrons int the atom are held due to coulomb forces.
(R) the atom is stable only because the centripetal force due to coulomb's law is balanced by the centrifugal force .

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

'A' is true and 'R' is false

D

'A' is false and 'R' is true

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-ATOMS-EXERCISE -IB
  1. Balmer series lies in which region of electromagnetic spectrum

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  2. (A) bohr's postulate states that the electrons, in stationary orbits a...

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  3. (A) electrons int the atom are held due to coulomb forces. (R) the a...

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  4. In Bohr model of the hydrogen atom, let R,v and E represent the radiu...

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  5. The lines in Balmer series have their wavelengths lying between

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  6. Assertion: Magnetic force between two short magnets, when they are co-...

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  7. The energy of a photon of wavelength lambda is

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  8. (A) bohr model can not be extended to two or more electron atoms. (R...

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  9. (A) large angle of scattering of alpha particles led to the discovery ...

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  10. (A) the trajetory traced by an incident particle depends on the impact...

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  11. Thickness of the foil of gold used in alpha-particle scattering experi...

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  12. In scattering experiment, find the distance of closest approach, if a ...

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  13. According the classical theory of Rutherford's model, the path of elel...

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  14. When an electron of the hydrogen atom jumps from a higher to lower en...

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  15. (A) hydrogen atom consists of only one electron but its emission spect...

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  16. (A) for the scattering of alpha- particles at large angles, only the n...

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  17. Statement-1 : Between any two given energy levels, the number of abosr...

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  18. (A) atoms of each element are stable and emit characteristic spectrum....

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  19. (A) most of the mass of the atom is concentrated in its nucleus. (R)...

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  20. (A) bohr's third postulaate states that the stationary orbits are thos...

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