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Chapter 1: Chemical Reactions and Equations

Answers True False Chemical Reactions and Equations

By Dr. Vikas JasrotiaSeptember 29, 2020

The post Answers True False Chemical Reactions and Equations contain all answers to the previous post in a proper manner.…

Chapter 1: Chemical Reactions and Equations

True False Assignment Chemical Reactions and Equations

By Dr. Vikas JasrotiaSeptember 28, 2020

The Post True False Assignment Chemical Reactions and Equations contains subjective questions along with fill-ups and true-false type questions. This…

Browsing: Fillups

Answers True False Chemical Reactions and Equations

True False Assignment Chemical Reactions and Equations

Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate the threshold frequency (ν0) and work function (W0) of the metal.

Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy of sodium in kJ mol–1.

Question 2.9: A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the metal is 2.13 eV. Calculate (i) the energy of the photon (eV), (ii) the kinetic energy of the emission, and (iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19 J).

Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate the threshold frequency (ν0) and work function (W0) of the metal.

Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy of sodium in kJ mol–1.