Chemistry-
General
Easy
Question
Atomic weight as the fundamental property of atom was first recognised by:
- Newlands
- Dobereiner
- Moseley
- Mendeleev
The correct answer is: Dobereiner
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Modern periodic law was proposed by:
Modern periodic law was proposed by:
Chemistry-General
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Which of the following is the contribution of John Dalton to the field of classification of elements ?
Which of the following is the contribution of John Dalton to the field of classification of elements ?
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Which of the following is the basis for Lavoisier’s classification of elements ?
Which of the following is the basis for Lavoisier’s classification of elements ?
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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
Chemistry-General
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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
Chemistry-
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
Chemistry-
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
Chemistry-
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
Chemistry-
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
