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Number of spectral lines in hydrogen ato...

Number of spectral lines in hydrogen atom is

A

6

B

8

C

15

D

`infty`

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The correct Answer is:
D
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TARGET PUBLICATION-ATOMS, MOLECULES AND NUCLEI -Competitive Thinking
  1. An electron in a hydrogen atom undergoes a transition from higher ener...

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  2. Hydrogen atom excites energy level from fundamental state to n = 3. Nu...

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  3. Number of spectral lines in hydrogen atom is

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  4. An electron of stationary hydrogen atom jumps from 4^(th) energy level...

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  5. A photon of wavelength 300nm interacts with a stationary hydrogen atom...

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  6. If the electron in hydrogen atom jumps from second Bohr orbit to group...

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  7. What is the wavelength of ligth for the least energetic photon emitted...

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  8. Atomic weight of boron is 10.81 and it has two isotopes .5 B^10 and .5...

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  9. If a proton and anti-proton come close to each other and annihilate, h...

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  10. A nucleus splits into two nuclear parts having radii in the ratio 1:2 ...

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  11. A nucleus of mass 20 u emits a gamma-photon of energy 6 MeV. If the e...

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  12. Half-life of radioactive sample, when activity of material initially w...

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  13. If 20 gm of a radioactive substance due to radioactive decay reduces t...

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  14. Given a sample of radius -226 having half-life of 4 days. Find, the pr...

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  15. During mean life of a radioactive element, the fraction that disintegr...

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  16. A mixture consists of two radioactive materials A1 and A2 with half-li...

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  17. The activity of a radioactive sample is measured as N0 counts per minu...

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  18. (I): In a beta^(-1) decay in a nucleus, a daughter nucleus that has di...

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  19. Half-life of a radioactive substance is 20 minutes. Difference between...

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