1st Year Chemistry MCQS with Answers Chapter 5

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1st Year Chemistry MCQS with Answers
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The wave number of the light emitted by a certain source is 2 x 106 m. the wavelength of this light is
500 nm
200 nm
5 x 107m
500 m

The velocity of photon is
Depends on its wavelength
Depends on its source
Independent of its wavelength
Equal to square of its amplitude

Splitting of spectral lines when atoms are subjected to strong electric field is called
Photoelectric effect
Zeeman effect
Compton effect
Stark effect

Which of the following particles would on losing an electron has its outermost p-orbital as half filled
Nitrogen atom

The atomis radius is of the order of

In the ground state of an atom, the electron is present
In the nucleus
In the second shell
Farthest from the nucleus
Nearest to the nucleus

Bohr’s model of atom is contradicted by
Heisenberg’s uncertainty principle
Quartization of angular members
Quartization of energy of electrons
Planck quantum theory

Rutherford’s model of atom failed because
There is actually no space between the nucleus and the electrons
It did not account for the stability of the atom
It did not account for the attraction between protons and neutrons
The atom did not have a nucleus and electrons

The charge on electron was determined by millikan in his oil drop experiment and its value is
1.602 x 10-23C
1.602 x 10-19C
6.023 x 10-23C
6.625 x 10-34C

Which of the following represents electronic configuration of the most electropositive elements
He [2s2]
Xe [6s2]
He [ 2s-1]
Xe [6s1]

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