Free Printable Quantum Mechanics and Band theory

1.

Which orbitals cannot exist

a)

3p

b)

4d

c)

3f

d)

6s

2.

True or False: Electrons are considered stable at their ground state.

a)

TRUE

b)

FALSE

3.

For an electron to change from ground state to an excited state it must...

a)

Absorb energy

b)

Release energy

4.

The orbital that an electron moves to after it releases energy is called the

a)

ground state

b)

excited state

c)

s orbital

d)

f orbital

5.

A three-dimensional region around a nucleus where an electron may be found is called ---?

a)

orbit

b)

circle

c)

orbital

d)

circuit

6.

Which of the following theories cannot be explained by classical theory?

a)

Electron Thoery

b)

Photo-electric effect

c)

Lorentz thoery

d)

electron gas

e)

drift velocity

7.

Wiedemann-Franz law could be verified by Classical free electron theory

a)

True

b)

False

8.

Drude-Lorenz thoery is known as

a)

Quantum free electron thoery

b)

Classical Free electron theory

9.

Black body radiation could be explained by quantum free electron theory.

a)

False

b)

True

c)

Partially Explain

10.

What is the spin of an electron?

a)

0

b)

+1

c)

+1/2

d)

-1/2

e)

-1

11.

Which of the following is not explained by quantum free electron theory?

a)

Zeeman effect

b)

Compton effect

c)

Hall effect

d)

Joule Thomson effect

12.

Electron is a Fermion.

a)

False

b)

True

13.

Particles which are obeying Fermi-Dirac statistics are called

a)

Muon

b)

Boson

c)

nucleon

d)

fermion

e)

meson

14.

Fermi Dirac Distribution function is

a)

$f\left(E\right)\ =\ \frac{1}{1+\ \exp\left(E+\frac{E_F}{kT}\right)}$

b)

$f\left(E\right)\ =\ \frac{1}{1\ -\ \exp\left(E+\frac{E_F}{kT}\right)}$

c)

$f\left(E\right)\ =\ \frac{E}{1+\ \exp\left(\frac{E-E_F}{kT}\right)}$

d)

$f\left(E\right)\ =\ \frac{1}{1+\ \exp\left(\frac{E-E_F}{kT}\right)}$

15.

In the figure the y-axis represents

a)

Energy level

b)

Temperature

c)

Probability of occupation

16.

which one of the following does not exist?

a)

space-charge polarization

b)

atomic polarization

c)

ionic polarisation

d)

total polarization

17.

Which of the following is FALSE?

a)

Fermi-Dirac function deals with probability

b)

space charge polarization is the strongest.

c)

NaCl exhibits Ionic polarization

d)

There are no free electrons in dielectric material

e)

Nitrobenzene is a polar dielectric.

18.

The equation 'N(E) dE =' deals about

a)

Density of states

b)

Paul-Drude theory

c)

Fermi-Distribution function

d)

dielectric polarisation

e)

dielectric constant

19.

What happens to the free electrons when an electric field is applied?

a)

They remain stable

b)

They move randomly and collide each other

c)

They move in the direction of the field

d)

They move in the direction opposite to that of electric field.

20.

What is the level that acts as a reference which separates the vacant and filled states at absolute temperature?

a)

Fermi energy level

b)

ground level

c)

excited level

d)

valence orbit

Quantum Mechanics and Band theory

Total questions: 20

Worksheet time: 21mins

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