Chemistry-
General
Easy
Question
The ratio of wave lengths of first line of Lymen series in Li+2 and first line of Lymen series in deuterium(1H2)is:
- 1:9
- 9:1
- 1:4
- 4:1
The correct answer is: 1:9
Related Questions to study
chemistry-
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:
chemistry-General
chemistry-
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:
chemistry-General
chemistry-
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:
chemistry-General
chemistry-
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:
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:
chemistry-General
chemistry-
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+:
chemistry-General
chemistry-
The velocity of electron in third excited state of Be3+ will be-
The velocity of electron in third excited state of Be3+ will be-
chemistry-General
physics-
A photodetector is made from a semiconductor In 
As with 
. What is the maximum wavelength, which it can detect
A photodetector is made from a semiconductor In As with . What is the maximum wavelength, which it can detect
physics-General
chemistry-
For Li+2,r2:r5 will be-
For Li+2,r2:r5 will be-
chemistry-General
chemistry-
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–
chemistry-General
chemistry-
Mass of neutron is........times the mass of electron -
Mass of neutron is........times the mass of electron -
chemistry-General
chemistry-
Which has highest e/m ratio–
Which has highest e/m ratio–
chemistry-General
chemistry-
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)
chemistry-General
General
________ is a sudden shaking of the Earth’s crust.
________ is a sudden shaking of the Earth’s crust.
GeneralGeneral
chemistry-
For the structure given below the site marked as S is a :
For the structure given below the site marked as S is a :
chemistry-General
chemistry-
A compound alloy of gold and copper crystallizes in a cube lattice in which the gold atoms occupy the corners of a cube and the copper atoms occupy the centres of each of the cube faces. The formula of this compound is-
A compound alloy of gold and copper crystallizes in a cube lattice in which the gold atoms occupy the corners of a cube and the copper atoms occupy the centres of each of the cube faces. The formula of this compound is-
chemistry-General
