Everyday Science MCQs

5120 MCQs  (Page 332 of 512)

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Pressure in gas discharge tube was kept________________?
A. 10 torr
B. 1 torr
C. 0.1 torr
D. 0.01 torr
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Angle of deflection was studied by________________?
A. Hitorff
B. Stoney
C. William crookes
D. J.perrin
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Positive rays give flash on________________?
A. Agno3 plate
B. Agcl plate
C. Zno
D. Zns
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The value of e/m ratio of electron is________________?
A. 6.02 x 1023 c/kg
B. 1.7588 x 1020 c/kg
C. 9.1095 x 10-31 c/kg
D. 1.7588 x 1011 c/kg
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Planks theory says energy is emitted__________________?
A. In continuous manner
B. Discontinuous manner
C. Simultaneously
D. In the form of heat
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2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?
A. 2-times
B. 3-times
C. 4-times
D. 6 times
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The magnetic quantum number (QN) has its values determined directly by the value of_______________?
A. Principal (qn)
B. Azimuthal (qn)
C. Spin (qn)
D. Both a & b
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The maximum number of electron in a sub shell with ? = 3fs______________?
A. 6
B. 10
C. 14
D. 18
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When an atom absorbs energy the lines in the spectrum will appear which are_________________?
A. Brighter
B. Darker
C. Colourless
D. Hard to locate
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Which one is not true about cathode rays ?
A. 9.11×10-31 kg
B. Cast shadow
C. Heat up the platinum foil
D. Cannot ionize
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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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