A. Lyman series is a continuous spectrum.
B. Paschen series is a line spectrum in the infra red.
C. Balmer series is a line spectrum in the ultraviolet.
D. the spectral series formula can be derived from the Rutherford model of the hydrogen atom.
Submitted by: Tauseef Ali
Related Mcqs:
- Rain drops fall from great height Which among the following statements is true regarding it?
A. they fall with that ultimate velocity, which are different for different droplets
B. they fall with same ultimate velocity
C. their velocity increases and they fall with different velocity on the earth
D. their velocity increases and they fall with same velocity on the earthSubmitted by: Abid Hussain
- Which of the following statements is true when we see ‘rainbow’ ?
A. We face sun and raindrops
B. The Sun remains behind us and we face raindrops
C. In light rainfall, we face Sun
D. The sky remains clear and the sun is at lower position in the skySubmitted by: Abid Hussain
- Which one is true for internal energy ?
A. It is sum of all forms of energies associated with molecules of a system
B. It is a state function of a system
C. It is proportional to transnational K.E of the molecules
D. All are correct - Which one of the following is nearly monochromatic light ?
A. light form fluorescent tube
B. light form neon lamp
C. light form sodium lamp
D. light form simple lamp - Which of the following types of force can do no work on the particle on which it acts ?
A. frictional force
B. gravitational force
C. elastic force
D. centripetal force - Radioactive decay obeys which one of the following law ?
A. N=Noe-λt
B. N=Noeλt
C. N=Noe-λt/2
D. No=N(1+eλt) - Which of the following will be a better shield against gamma rays ?
A. Ordinary water
B. Heavy water
C. Lead
D. Aluminum - Which one of the following has the largest energy content ?
A. 103 photons of wavelength 2 pm (γ-rays)
B. 102 photons of wavelength 1nm (x-rays)
C. 106 photons of wavelength 50?m (infrared)
D. 106 photons of wavelength 200nm (UV) - Which of the following is not a unit of length?
A. light year
B. radian
C. angstrom
D. micronSubmitted by: Zahid Jagirani
- Which of the following pair of forces can produce a resultant of 8N?
A. 2N & 5N
B. 20N & 2N
C. 3N & 6N
D. 4N & 1NSubmitted by: Zahid Jagirani
