Browsing: Nitric acid

Class 12

p-Block Elements Class 12 Notes

By Dr. Vikas JasrotiaMay 11, 2021

p-Block Elements Class 12 Notes p-Block Elements Class 12 Notes The elements in which the last electron enters in the…

Class 12

Compounds and Properties of Nitrogen

By Dr. Vikas JasrotiaDecember 7, 2020

Compounds and Properties of Nitrogen Dinitrogen Preparation of Dinitrogen: Dinitrogen is produced commercially by the liquefaction and fractional distillation of…

Browsing: Nitric acid

p-Block Elements Class 12 Notes

Compounds and Properties of Nitrogen

Atoms and Molecules Class 9 Questions (MCQs)

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.

Atoms and Molecules Class 9 Questions (MCQs)

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.