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JEE 2020 Chemsitry: Atomic Structure Quiz-1 13.06.2019

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Question 1

What is the work function(in eV)of the metal if the light of wavelength 4000 Å generates photoelectrons of velocity ms–1 from it?
(Mass of electron = kg
Velocity of light =
Planck’s constant = Js
Charge of electron = )

Question 2

The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 20 m/s is approximately:

Question 3

The orbital angular momentum for an electron revolving in an orbit is given . This momentum for an s-electron will be given by

Question 4

Which of the following sets of quantum numbers represents the highest energy of an atom?

Question 5

Which one of the following sets of ions represents a collection of isoelectronic species?

Question 6

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is :

Question 7

The photon of hard gamma radiation knocks a proton out of nucleus to form

Question 8

In Bohr series of lines of hydrogen spectrum, third line from the red end corresponds to which one of the following inner orbit jumps of electron of Bohr orbit in atom of hydrogen

Question 9

Consider the ground state of Cr atom (Z = 24). The number of electrons with the azimuthal quantum numbers l =1 and 2 are respectively

Question 10

Based on the equation :

the wavelength of the light that must be absorbed to excite hydrogen electron from level to level will be :
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Sep 30JEE & BITSAT