Question 2.12: Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength…
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Question 2.11: A 25-watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta…
Question 2.10: Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize the sodium atom. Calculate the ionization energy…
Question 2.9: A photon of wavelength 4 × 10–7 m strikes on the metal surface, the work function of the…
Question 2.8: What is the number of photons of light with a wavelength of 4000 pm that provide 1 J…
Question 2.7: Calculate the wavelength frequency and wave number of a light wave whose period is 2.0 × 10–10 s.…
Class 11 Chemistry Chapter 2 Question 2.1 https://www.youtube.com/watch?v=_lNTTItFsbg&t=32s Question 2.1: (i) Calculate the number of electrons which will together weigh…
https://www.youtube.com/watch?v=wPSp-xSYWsw Question 2.4: Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A)…
https://www.youtube.com/watch?v=6-di0ujG_Ew Question 2.3: How many neutrons and protons are there in the following nuclei? 136C, 168O, 2412Mg, 5626Fe, 8838Sr…
Important Questions of Periodic Classification of Elements Class 11 Important Questions of Periodic Classification of Elements Class 11 Que 1.…