Chemistry-
General
Easy
Question
Which of the following is the basis for Lavoisier’s classification of elements ?
- Atomic number
- Proton number
- Physical properties
- Neutron number
The correct answer is: Physical properties
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According to Bohr’s theory the angular momentum of electron in 5th orbit is:
According to Bohr’s theory the angular momentum of electron in 5th orbit is:
Chemistry-General
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In a multielectron atom which of the following orbitals described by three quantum numbers will have same energy in the absence of magnetic and electric fields ?
a) n=1 l=0, m=0
b) n=2, l=0 m=0
c) n=2 l=1 m=1
d) n=3 l=2 m=1
e) n=3 l=2 m=0
In a multielectron atom which of the following orbitals described by three quantum numbers will have same energy in the absence of magnetic and electric fields ?
a) n=1 l=0, m=0
b) n=2, l=0 m=0
c) n=2 l=1 m=1
d) n=3 l=2 m=1
e) n=3 l=2 m=0
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How many sets of four quantum numbers are possible for electrons present in He-2 anion?
How many sets of four quantum numbers are possible for electrons present in He-2 anion?
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A transition metal ‘X’ has configuration [Ar] 3d4 in its+3 oxidation state.Its atomic number is....
A transition metal ‘X’ has configuration [Ar] 3d4 in its+3 oxidation state.Its atomic number is....
Chemistry-General
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A cricket ball of 0.5 kg is moving with a velocity of 100m/s. The wavelength associated with its motion is:
A cricket ball of 0.5 kg is moving with a velocity of 100m/s. The wavelength associated with its motion is:
Chemistry-General
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The velocities of two particles A and B are 0.05 and 0.02 m/s respectively. The mass of B is five times the mass of A. The ratio of their de Broglie wave lengths is.....
The velocities of two particles A and B are 0.05 and 0.02 m/s respectively. The mass of B is five times the mass of A. The ratio of their de Broglie wave lengths is.....
Chemistry-General
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According to de Broglie concept, the circumference of each electron must be equal to.......
According to de Broglie concept, the circumference of each electron must be equal to.......
Chemistry-General
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The maximum number of electrons in an atom which can have (n+l) = 4 is:
The maximum number of electrons in an atom which can have (n+l) = 4 is:
Chemistry-General
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If Pauli’s exclusion principle is not known the electronic arrangement of lithium atom would be:
If Pauli’s exclusion principle is not known the electronic arrangement of lithium atom would be:
Chemistry-General
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The following illustrates impossibility of measurement of position and velocity of an electron simultaneously.
The following illustrates impossibility of measurement of position and velocity of an electron simultaneously.
Chemistry-General
Chemistry-
. Energy of an electron in an atom...
. Energy of an electron in an atom...
Chemistry-General
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Energy of an electron in Bohr’s nth orbit is.......
Energy of an electron in Bohr’s nth orbit is.......
Chemistry-General
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The wavelength of limiting line of Pfund series is:
The wavelength of limiting line of Pfund series is:
Chemistry-General
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If 
are threshold wavelength and wavelength of incident light, the velocity of photo electrons ejected will be......
If are threshold wavelength and wavelength of incident light, the velocity of photo electrons ejected will be......
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The frequency of spectral line obtained when electron in n=3 of hydrogen atom drops to ground state is?
The frequency of spectral line obtained when electron in n=3 of hydrogen atom drops to ground state is?
Chemistry-General
