Samacheer Kalvi solutions for Science [English] Class 10 SSLC TN Board chapter 6 - Nuclear Physics [Latest edition]

Man-made radioactivity is also known as _______.

Unit of radioactivity is _______

Artificial radioactivity was discovered by ______.

In which of the following, no change in mass number of the daughter nuclei takes place

1. α decay
2. β decay
3. γ decay
4. neutron decay

_______ isotope is used for the treatment of cancer.

Gamma radiations are dangerous because

________ aprons are used to protect us from gamma radiations.

Which of the following statements is/are correct?

1. α particles are photons
2. Penetrating power of γ radiation is very low
3. Ionization power is maximum for α rays
4. Penetrating power of γ radiation is very high

Proton - Proton chain reaction is an example of ______.

In the nuclear reaction ₆X¹² α decay _ZY^A, the value of A & Z.

Kamini reactor is located at ______.

Which of the following is/are correct?

1. Chain reaction takes place in a nuclear reactor and an atomic bomb.
2. The chain reaction in a nuclear reactor is controlled
3. The chain reaction in a nuclear reactor is not controlled
4. No chain reaction takes place in an atom bomb

One roentgen is equal to _______ disintegrations per second.

Positron is an ________.

Anemia can be cured by ______ isotope.

Abbreviation of ICRP______.

_______ is used to measure exposure rate of radiation in humans.

________ has the greatest penetration power.

_ZY^A → _Z+1Y^A + X ; Then, X is _____

_ZX^A → _ZY^A This reaction is possible in ________ decay.

The average energy released in each fusion reaction is about ______ J.

Nuclear fusion is possible only at an extremely high temperature of the order of ____ K.

The radio isotope of ________ helps to increase the productivity of crops.

If the radiation exposure is 100 R, it may cause ______.

Plutonium -239 is a fissionable material.

Elements having atomic number greater than 83 can undergo nuclear fusion.

Nuclear fusion is more dangerous than nuclear fission.

Natural uranium U-238 is the core fuel used in a nuclear reactor.

If a moderator is not present, then a nuclear reactor will behave as an atom bomb.

During one nuclear fission on an average, 2 to 3 neutrons are produced.

Einstein’s theory of mass-energy equivalence is used in nuclear fission and fusion.

Match: I

Match: II

Match: III

Match: IV

Match: V

Arrange in descending order, on the basis of their penetration power

Alpha rays, beta rays, gamma rays, cosmic rays

Arrange the following in the chronological order of discovery

Nuclear reactor, radioactivity, artificial radioactivity, discovery of radium.

Use the analogy to fill in the blank

Spontaneous process: Natural Radioactivity, Induced process: _______.

Use the analogy to fill in the blank.

Nuclear Fusion : Extreme temperature, Nuclear Fission : _______

Increasing crops : Radio phosphorous, Effective functioning of heart : _____

Deflected by electric field : α ray, Null Deflection : ______

₈₈Ra²²⁶ experiences three α - decay. Find the number of neutrons in the daughter element.

A cobalt specimen emits induced radiation of 75.6 millicurie per second. Convert this disintegration in to becquerel (one curie = 3.7 × 10¹⁰ Bq)

Mark the correct choice as

1. Assertion: A neutron impinging on U²³⁵, splits it to produce Barium and Krypton.
2. Reason: U - 235 is a fissile material.

Mark the correct choice as

1. Assertion: In a β - decay, the neutron number decreases by one.
2. Reason: In β - decay atomic number increases by one.

Mark the correct choice as

1. Assertion: Extreme temperature is necessary to execute nuclear fusion.
2. Reason: In a nuclear fusion, the nuclei of the reactants combine releasing high energy.

Mark the correct choice as

1. Assertion: Control rods are known as 'neutron seeking rods'
2. Reason: Control rods are used to perform sustained nuclear fission reaction

Who discovered natural radioactivity?

Which radioactive material is present in the ore of pitchblende?

Write any two elements which are used for inducing radioactivity?

Write the name of the electromagnetic radiation which is emitted during a natural radioactivity.

If A is a radioactive element which emits an α - particle and produces ₁₀₄Rf ²⁵⁹. Write the atomic number and mass number of the element A

What is the average energy released from a single fission process?

Which hazardous radiation is the cause for genetic disease?

What is the amount of radiation that may cause the death of a person when exposed to it?

When and where was the first nuclear reactor built?

Give the SI unit of radioactivity.

Which material protects us from radiation?

Write any three features of natural and artificial radioactivity.

Define critical mass.

Define one roentgen.

State Soddy and Fajan’s displacement law.

Give the function of control rods in a nuclear reactor.

In Japan, some of the new born children are having congenital diseases. Why?

Mr. Ramu is working as an X-ray technician in a hospital. But, he does not wear the lead aprons. What suggestion will you give to Mr. Ramu?

What is stellar energy?

Give any two uses of radio isotopes in the field of agriculture?

Explain the process of controlled and uncontrolled chain reactions.

Compare the properties of alpha, beta, and gamma radiations.

What is a nuclear reactor? Explain its essential parts with their functions.

Mass number of a radioactive element is 232 and its atomic number is 90. When this element undergoes certain nuclear reactions, it transforms into an isotope of lead with a mass number 208 and an atomic number 82. Determine the number of alpha and beta decay that can occur.

'X – rays should not be taken often'. Give the reason.

Cell phone towers should be placed far away from the residential area – why?