Chapter 2 – Atomic Structure
Assertion (A) It is impossible to determine the exact position and exact momentum of an electron simultaneously. Reason (R) The path of an electron in an atom is clearly defined.
12
Nov
Assertion (A) It is impossible to determine the exact position and exact momentum of an electron simultaneously. Reason (R) The path of an electron in an atom is clearly defined. Assertion (A) It is impossible to determine the exact position and exact momentum of an electron simultaneously. Reason (R) The path of an electron in [...]
Assertion(A) Black body is an ideal body that emits and absorbs radiations of all frequencies. Reason(R) The frequency of radiation emitted by a body goes from a lower frequency to higher frequency with an increase in temperature.
12
Nov
Assertion(A) Black body is an ideal body that emits and absorbs radiations of all frequencies. Reason(R) The frequency of radiation emitted by a body goes from a lower frequency to higher frequency with an increase in temperature. For the electrons of oxygen atom Which of the following solutions has the highest pH ? November 12, [...]
Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled by the number of electron s in the atom.
12
Nov
Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled by the number of electron s in the atom. Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled [...]
Table-tennis ball has mass 10g and s peed of 90m/s. if speed can be meausred within an accuracy of 4%. What will be the uncertainly in speed and position?
12
Nov
Table-tennis ball has mass 10g and s peed of 90m/s. if speed can be meausred within an accuracy of 4%. What will be the uncertainly in speed and position? Table-tennis ball has mass 10g and s peed of 90m/s. if speed can be meausred within an accuracy of 4%. What will be the uncertainly in [...]
According to de Broglie, matter should exhibit dual behaviour, that is both particle and wave like properties. However, a cricket ball of mass 100g does not move like a wave when it is thrown by a bowler at a speed of 100km/h. Calculate the wavelength of the ball and explain why it does not show wave nature.
12
Nov
According to de Broglie, matter should exhibit dual behaviour, that is both particle and wave like properties. However, a cricket ball of mass 100g does not move like a wave when it is thrown by a bowler at a speed of 100km/h. Calculate the wavelength of the ball and explain why it does not show [...]
Tags:
a cricket ball of mass 100g does not move like a wave when it is thrown by a bowler at a speed of 100km/h. Calculate the wavelength of the ball and explain why it does not show wave nature. ,
According to de Broglie ,
matter should exhibit dual behaviour ,
that is both particle and wave like properties. However ,
The Balmer series in the hydrogen spectrum corresponds to the transition from n1=2 to n2=3,4…….. This series lies in the visible region. Calculate the wave number of line associated with the transition in Balmer series when the electron moves to n=4 orbit. (RH=109677cm^−1)
12
Nov
The Balmer series in the hydrogen spectrum corresponds to the transition from n1=2 to n2=3,4…….. This series lies in the visible region. Calculate the wave number of line associated with the transition in Balmer series when the electron moves to n=4 orbit. (RH=109677cm^−1) 4........ This series lies in the visible region. Calculate the wave number [...]
Wavelengths of different radiations are given below: (A) 300nm (B) 300μm (C) 3nm (30A∘ Arrange these radiations in the increasing order of their energies.
12
Nov
Wavelengths of different radiations are given below: (A) 300nm (B) 300μm (C) 3nm (30A∘ Arrange these radiations in the increasing order of their energies. Wavelengths of different radiations are given below: (A) 300nm (B) 300μm (C) 3nm (30A∘ Arrange these radiations in the increasing order of their energies. November 12, 2020 Category: Chapter 2 - [...]
Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals :
12
Nov
Out of the following pairs of electrons, identify the pairs of electrons present in degenerate orbitals : identify the pairs of electrons present in degenerate orbitals : Out of the following pairs of electrons November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
If travelling at same speeds, which of the following matter waves have the shortest wavelength?
12
Nov
If travelling at same speeds, which of the following matter waves have the shortest wavelength? If travelling at same speeds which of the following matter waves have the shortest wavelength? November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
For the electrons of oxygen atom, which of the following statements is correct ? (a) Zeff for an electron in a 2s orbital is the same as Zeff for an electron in a 2p orbital (b) An electron in the 2s orbital has the same energy as an electron in the 2p orbital (c) Zeff for electron in 1s orbital is the same Zeff for an electron in a 2s orbital (d) The two electrons present in the 2s orbital have spin quantum number ms but of opposite sign
12
Nov
For the electrons of oxygen atom, which of the following statements is correct ? (a) Zeff for an electron in a 2s orbital is the same as Zeff for an electron in a 2p orbital (b) An electron in the 2s orbital has the same energy as an electron in the 2p orbital (c) Zeff [...]