Atomic Structure Test

Result

Atomic Structure Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

In which of these cases spectral lines are caused due to emission of electron in hydrogen atom?

A
Absorption of energy

B
Radiation of energy due to orbital motion

C
Emission of energy

D
None of these

Solution

When electron absorb energy, spectral lines are caused due to emission of electron.
Question 2
1 / -0

A stationary He⁺ ion emitted a photon corresponding to the first line of the Lyman series. The photon liberates a photo electron from a stationary hydrogen atom in ground state. The kinetic energy of electron is

A
10.2 eV

B
13.6 eV

C
20.4 eV

D
27.2 ev

Solution

Energy of emitted photon=[-13.6/1²*4-13.6/2²*4]eV
=3*13.6 eV
So, KE of electron=[3*13.6-13.6]=27.2 eV
Question 3
1 / -0

Bohr’s model has failure in demonstrating splitting of spectral lines due to magnetic field. What is this effect known as?

A
Zeeman effect

B
Stark effect

C
Condensation effect

D
Induction effect

Solution

Splitting of spectral lines due to magnetic field is known as Zeeman effect.
Question 4
1 / -0

which of the following is not a property of cathode rays :

A
they are made up of material particles

B
they affect photographic plates

C
they do cause ionization of gas.

D
they do not produce heating effect.

Solution

When cathode rays strike a metal foil , it becomes hot . which does indicate that cathode rays produce a heating effect.