Structure of Atom Quiz 5 – Punjab Meritorious School Preparation Portal

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The wavelength of a moving electron having 4.55 × 10^–25 J of kinetic energy is :

The de-Broglie wavelength of an electron in the ground state of hydrogen atom is : [K.E. = 13.6 eV; 1eV = 1.602 × 10^-19J]

33.28 nm

3.328 nm

0.3328 nm

0.0332 nm

Which of the following is related with both wave nature and particle nature ?

If the radius of first Bohr orbit be a0, then the radius of the third orbit would be

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately (Planck’s constant, h = 6.63 × 10^–34 Js)

The mass of a photon with a wavelength equal to 1.54 × 10^–8 cm is

Which one of the following represents noble gas configuration :

When a metal surface is exposed to solar radiations

The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations

The emitted electrons have energy less than maximum value of energy depending upon intensity of incident radiation

The emitted electrons have zero energy

The emitted electrons have energy equal to energy of photons of incident light

The ratio of the radius of the first Bohr orbit for the electron orbiting the hydrogen nucleus to that of the electron orbiting the deuterium nucleus (mass nearly twice that of the hydrogen nucleus) is approximately

2 : 1

1 : 1

1 : 2

4 : 1

If electron, hydrogen, helium and neon nuclei are all moving with the velocity of light, then the wavelength associated with these particles are in the order

Electron > hydrogen > helium > neon

Electron > helium > hydrogen > neon

Electron < hydrogen < helium < neon

Neon < hydrogen < helium < electron

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