Chemistry
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal.
12
Nov
Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold frequency (v0) and work function (W0) of the metal. Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å . Calculate threshold [...]
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second .
12
Nov
A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57μ m. Calculate the rate of emission of quanta per second . November 12, 2020 Category: Chapter 2 - Atomic Structure [...]
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1.
12
Nov
An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom .Calculate the ionization energy of sodium in KJ mol^−1. November 12, 2020 Category: Chapter 2 - [...]
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J),
12
Nov
A photon of wavelength 4×10^−7m strikes on metal surface , the work function of the metal being 2.13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy of the emission and the velocity of the photoelectron (1eV=1,6020×10^−19J), 6020×10^−19J) A photon of wavelength 4×10^−7m strikes on metal surface the work function [...]
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ?
12
Nov
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s.
12
Nov
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s. and wave number of a light wave whose period is 2.0×10^−10s. Calculate the wavelength frequency November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å.
12
Nov
Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å. Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class [...]
Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light
12
Nov
Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light November 12, 2020 [...]
(i) Calculate the total number of electrons present in 1 mole of methane . (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of .14C. (Assume that mass of a neutron =1.675×10^−27g)
12
Nov
(i) Calculate the total number of electrons present in 1 mole of methane . (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of .14C. (Assume that mass of a neutron =1.675×10^−27g) identify the pairs of electrons present in degenerate orbitals : Out of the following pairs of [...]
(i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons .
12
Nov
(i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons . (i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons . November 12, 2020 Category: Chapter [...]