Everyday Science MCQs

5120 MCQs  (Page 329 of 512)

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Which of the following technique is used for the separation of insoluble particles from liquids ?
A. Filtration
B. Crystallization
C. Solvent extraction
D. Chromatography
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Pfund series are produced in the spectrum of hydrogen atom__________________?
A. When electrons jump down to 2nd- orbit
B. When electrons jump down to 3rd- orbit
C. When electrons jump down to 4th- orbit
D. When electrons jump down to 5th- orbit
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Sommerfelds modification in Bohrs model is_______________?
A. Orbit is cylindrical
B. Orbit is elliptical
C. Orbit is longitudinal
D. Orbit is asymmetrical
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Wavelength of electron was verified by_________________?
A. Moseley
B. Davisson and germer
C. Einstein
D. Roentgen
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The velocity of the photon____________________?
A. Is independent of wavelength
B. Depends upon source
C. Depends upon its frequency
D. Equals to the square of amplitude
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Atom cannot be divided into simple unitstheorized by________________?
A. Rutherford
B. Dalton
C. Bohr
D. Schrodinger
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The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
A. 6
B. 12
C. 18
D. 20
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Increase in atomic number is observed during_________________?
A. Alpha emission
B. Beta emission
C. Both a & b
D. Radioactivity
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Free neutron changes into proton with the emission of__________________?
A. Neutrino
B. Electron
C. Both a & b
D. Meson
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Charge of electron was measured by__________________?
A. J.j thomson
B. Millikan
C. Rutherford
D. Perrin
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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