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Chemistry MCQs

Chemistry MCQs

The splitting up of spectral lines under the influence of magnetic field is known as

– by 0

(a) Stark effect
(b) Photoelectric effect
(c) Zeeman effect
(d) Electromagnetic effect

Chemistry MCQs

The wavelength of light waves in inversely proportional to its

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(a) radius
(b) energy
(c) velocity
(d) quantum number

Chemistry MCQs

The first use of quantum theory to explain the structure of atom, was given by

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(a) Bohr
(b) Planck
(c) Einstien
(d) Heisenberg

Chemistry MCQs

The maximum energy is possessed by an electron, when it is present

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(a) in nucleus
(b) in ground energy state
(c) in first excited state
(d) at infinite distance from the nucleus

Chemistry MCQs

The energy of a hydrogen atom in its ground state is – 13.6 eV. The energy of the level corresponding to the energy level equal to 5 is

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(a) – 0.54 eV
(b) – 0.85 eV
(c) – 2.72 eV
(d) – 5.40 eV

Chemistry MCQs

The most probable radius (in pm) for finding the electron in He+ is

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(a) 0.0
(b) 26.5
(c) 52.9
(d) 105.8

Chemistry MCQs

When electrons of hydrogen atom return to L-shell from the shells of higher energy, we get a series of lines in the spectrum. This series is called

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(a) Lyman series
(b) Blamer series
(c) Brackett series
(d) Paschen series

Chemistry MCQs

Our sun belongs to which of the following spectra?

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(a) O
(b) B
(c) F
(d) G

Chemistry MCQs

The Bohr’s theory was modified to give the concept of elliptical by

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(a) Hund
(b) Davison
(c) Rutherford
(d) Sommerfeld

Chemistry MCQs

According to Bohr’s theory of hydrogen atom, which of the following is quantised for an electron?

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(a) velocity
(b) acceleration
(c) angular momentum
(d) angular acceleration

Chemistry MCQs

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