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Class 12

Chlorine its Properties and Oxoacids of Chlorine

By Dr. Vikas JasrotiaDecember 22, 2020

Chlorine its Properties and Oxoacids of Chlorine Chlorine (Cl2) (1) Preparation: It can be prepared by any one of the following methods: (i) By heating manganese…

Browsing: Chlorine

Chlorine its Properties and Oxoacids of Chlorine

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.