Nuclei Test

Result

Nuclei Test - 8

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

In γ-ray emission from a nucleus,

A
only the neutron number changes

B
only the proton number changes

C
both the neutron number and the proton number change

D
there is no change in proton number and the neutron number

Solution

there is no change in proton number and the neutron number
Question 2
1 / -0

Which of the following radiations has the least wavelength?

A
α-rays

B
X-rays

C
β-rays

D
γ-rays

Solution

Because they emit high energies.
Question 3
1 / -0

As the mass number A increases, which of the following quantities related to a nucleus does not change?

A
density

B
binding energy

C
mass

D
volume

Solution

All nucleus have equal densities irrespective of mass no. approximately equal to 2.3 × 10¹⁷ kgm^-3.
Question 4
1 / -0

In which of the following decays does the element not change?

A
β⁺decay

B
β⁻decay

C
α decay

D
γ decay

Solution

Because mass no and atomic no of product nuclei remains the same as parent nuclei after gamma decay.
Question 5
1 / -0

In any nuclear reaction the reactants and the resultants must always be in conformity with the law of conservation of

A
both charge and mass number

B
charge number alone

C
energy alone

D
mass number alone

Solution

During a nuclear reaction, the mass of reactants may be more than products. The lost mass is converted into an enormous amount of energy. Charge is conserved as total charge before and after the reaction always remain the same in nuclear reaction.
Question 6
1 / -0

Graphite and heavy water are two common moderators used in a nuclear reactor. The function of the moderator is

A
to slow down the neutrons to thermal energies

B
to cool the reactor

C
to absorb the neutrons and stop the chain reaction

D
to control the energy released in the reactor

Solution

Moderator is a medium that reduces speed of fast neutrons thereby turning them into thermal neutrons capable of sustaining a chain reaction. It extract energy from the core of the reactor.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Nuclei Test - 8

Result

Nuclei Test - 8

Score

-

Rank

-

SHARING IS CARING

Question 1

only the neutron number changes

only the proton number changes

both the neutron number and the proton number change

there is no change in proton number and the neutron number

Solution

Question 2

α-rays

X-rays

β-rays

γ-rays

Solution

Question 3

density

binding energy

mass

volume

Solution

Question 4

β+decay

β−decay

α decay

γ decay

Solution

Question 5

both charge and mass number

charge number alone

energy alone

mass number alone

Solution

Question 6

to slow down the neutrons to thermal energies

to cool the reactor

to absorb the neutrons and stop the chain reaction

to control the energy released in the reactor

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

β⁺decay

β⁻decay