NCERT Exemplar Class 11
The velocity associated with a proton moving in a potential difference of 1000V is 4.37 × 10^5 ms^−1. If the hockey ball of mass 0.1kg is moving with this velocity, calculate the wavelength associated with this velocity.
12
Nov
The velocity associated with a proton moving in a potential difference of 1000V is 4.37 × 10^5 ms^−1. If the hockey ball of mass 0.1kg is moving with this velocity, calculate the wavelength associated with this velocity. calculate the wavelength associated with this velocity. The velocity associated with a proton moving in a potential difference [...]
If the velocity of the electron in Bohr’s first orbit is 2.19×10^6ms^−1, calculate the de Broglie wavelength associated with it.
12
Nov
If the velocity of the electron in Bohr’s first orbit is 2.19×10^6ms^−1, calculate the de Broglie wavelength associated with it. calculate the de Broglie wavelength associated with it. If the velocity of the electron in Bohr's first orbit is 2.19×10^6ms^−1 November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class [...]
Calculate the wavelength for the emission transition if it starts from the orbit having radius 1.3225nm ends at 211.6pm. Name the series to which this transition belongs and the region of the spectrum.
12
Nov
Calculate the wavelength for the emission transition if it starts from the orbit having radius 1.3225nm ends at 211.6pm. Name the series to which this transition belongs and the region of the spectrum. What is the lowest value of n that allow g orbitals to exist? November 12, 2020 Category: Chapter 2 - Atomic Structure [...]
Emission transitions in the Paschen series end at orbit n=3 and start from orbit n and can be represented as v=3.29×10^15(Hz)[1/3^2−1/n^2]. Calculate the value of n if the transition is observed at 1285 nm. Find the region of the spectrum.
12
Nov
Emission transitions in the Paschen series end at orbit n=3 and start from orbit n and can be represented as v=3.29×10^15(Hz)[1/3^2−1/n^2]. Calculate the value of n if the transition is observed at 1285 nm. Find the region of the spectrum. What is the lowest value of n that allow g orbitals to exist? November 12, [...]
If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5×10^7ms^−1, calculate the energy with which it is bound to the nucleus.
12
Nov
If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of 1.5×10^7ms^−1, calculate the energy with which it is bound to the nucleus. calculate the energy with which it is bound to the nucleus. If the photon of the wavelength 150 [...]
The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying a voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal.
12
Nov
The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying a voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal. What is the lowest value of n that allow g orbitals to exist? November 12, 2020 Category: [...]
The work function for caesium atom is 1.9eV. Calculate (a) the threshold wavelength and (b) the threshold frequency of the radiation. If the caesium element is irradiated with a wavelength 500nm, calculate the kinetic energy and the velocity of the ejected photoelectron.
12
Nov
The work function for caesium atom is 1.9eV. Calculate (a) the threshold wavelength and (b) the threshold frequency of the radiation. If the caesium element is irradiated with a wavelength 500nm, calculate the kinetic energy and the velocity of the ejected photoelectron. calculate the kinetic energy and the velocity of the ejected photoelectron. The work [...]
Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck’s constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35
12
Nov
Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck’s constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35 Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck's constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35 November [...]
The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states.
12
Nov
The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states. The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states. November 12, 2020 Category: Chapter 2 - [...]
Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse is 2.5×10^15, calculate the energy of the source.
12
Nov
Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse is 2.5×10^15, calculate the energy of the source. What is the lowest [...]