Chemistry-
General
Easy
Question
Which of the following transition neither shows absorption nor emission of energy incase of Hydrogen atom:
- 3px→3s
- 3dxy→3dyz
- 3s→3dxy
- All the above
The correct answer is: All the above
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1s2 2s2 2p5 3s2 shown configuration of:
1s2 2s2 2p5 3s2 shown configuration of:
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The ratio of wave lengths of first line of Lymen series in Li+2 and first line of Lymen series in deuterium(1H2)is:
The ratio of wave lengths of first line of Lymen series in Li+2 and first line of Lymen series in deuterium(1H2)is:
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The wavelength of photon obtained by electron transition between two levels in H–atom and singly ionised He are λ1 and λ2 respectively, then:
The wavelength of photon obtained by electron transition between two levels in H–atom and singly ionised He are λ1 and λ2 respectively, then:
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The transition of electron in H-atom that will emit maximum energy is:
The transition of electron in H-atom that will emit maximum energy is:
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The figure indicates the energy level diagram for the origin of six spectral lines in emission spectrum (e.g. line no. 5 a rises from the transition from level B to X) which of the following spectral lines will not occur in the absorption spectrum: 
The figure indicates the energy level diagram for the origin of six spectral lines in emission spectrum (e.g. line no. 5 a rises from the transition from level B to X) which of the following spectral lines will not occur in the absorption spectrum:
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The wave number of first line of Balmer series of hydrogen atom is15200cm–1.Whatisthe wave number of first line of Balmer series of Li2+ ion:
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Which one of the following species will give a series of spectral lines similar to that of series of Mg2+:
Which one of the following species will give a series of spectral lines similar to that of series of Mg2+:
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The velocity of electron in third excited state of Be3+ will be-
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A photodetector is made from a semiconductor In 
As with 
. What is the maximum wavelength, which it can detect
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For Li+2,r2:r5 will be-
For Li+2,r2:r5 will be-
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When the atoms of gold sheet are bombarded with a be am of α-particles, only a few α- particles get deflected where as most of them go straight un deflected. This is because–
When the atoms of gold sheet are bombarded with a be am of α-particles, only a few α- particles get deflected where as most of them go straight un deflected. This is because–
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Mass of neutron is........times the mass of electron -
Mass of neutron is........times the mass of electron -
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Which has highest e/m ratio–
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At room temperature, sodium crystal lises in a body centred cubic cell with a=4.24Å. The the oretical density of sodium is–(Atomic mass of sodium=23.0gmol–1)
At room temperature, sodium crystal lises in a body centred cubic cell with a=4.24Å. The the oretical density of sodium is–(Atomic mass of sodium=23.0gmol–1)
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General
________ is a sudden shaking of the Earth’s crust.
________ is a sudden shaking of the Earth’s crust.
GeneralGeneral
