Solved Numericals Chap # 18 – Physics 10th

Atomic and Nuclear Physics:

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Physics Ch#18, 10th Class

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1 / 56

The number of neutrons in a nucleus is represented by_______

A

Z

None of these

N

2 / 56

Transmutation is _____________

Spontaneous process

Unstable nuclei changes into stale nuclei

Both "Unstable nuclei changes into stale nuclei" & "Spontaneous process"

No spontaneous process

3 / 56

Who accidentally discovered that uranium salt crystals emit an invisible radiation that can darken a photographic plate?

Marie Curie

Becquerel

Rutherford

Pierre

4 / 56

Which compound is used for diagnosis of brain tumor?

iodine-131

hydrogen-3

Neon-152

Phosphorus-32

5 / 56

Which are chemical compounds containing some quantity of radioisotope?

High Energy Compounds

Hard Compounds

Soft Compounds

Radioactive Tracer

6 / 56

Half-life of   (60-27)Co is _________

20 years

50 years

30 years

40 years

7 / 56

Stream of high energy electrons_____________

β-Particles

α particles

∑-particles

γ-particles

8 / 56

Which Radioactive isotope is used for curing cancerous tumors and cells?

C-14

I-131

P-32

Co-60

9 / 56

The total number of nucleons in a nucleus is__________

Atomic Mass Number

none of these

Atomic number

Isotope number

10 / 56

The phenomenon by which radiations split matter into positive and negative ion is called ____

Sublimation

Deflection

Ionization

Penetration

11 / 56

Elements are naturally unstable having atomic number greater than_________

84

89

82

88

12 / 56

The rate of radioactive decay is proportional to the number of __________

Stale Nuclei Present

Proton Present

Electrons Present

Unstable Nuclei Present

13 / 56

What happens to the atomic number of an element which emits 1 alpha particle?

Decreases By 1

Increases By 1

Decreases By 2

Stays the Same

14 / 56

When a tree dies, which radioactive isotope present in plant starts decaying?

P-32

I-131

C-14

Co-60

15 / 56

Penetrating power of γ rays as compared to α rays and β rays is __________

Equal

Anyone of these

Smaller

Greater

16 / 56

The temperature of the center of sun is _________

24 Million Kelvin

02 Million Kelvin

29 Million Kelvin

20 Million Kalvin

17 / 56

Radium-226 has a half-life of _____________

1920 years

1820 years

1620 years

1600 years

18 / 56

When Uranium (98 protons) ejects a beta particle, how many protons are let in the remaining nucleus?

92 Protons

93 Protons

89 Protons

91 Protons

19 / 56

Which statement is correct about isotopes?

Protium, deuterium and tritium are isotopes of hydrogen

Atoms of an element have same number of protons.

All of these

Atoms of an element have different number of neutrons in their nuclei

20 / 56

The number of protons and neutrons in a nucleus or atomic mass is represented by______

N

Z

A

None of these

21 / 56

The atomic number is represented by_______

A

None of these

N

Z

22 / 56

Nuclear fission was first observed in 1939 by__________

First and Curie

Otto Hahn and Frits Strassman

Otto Han and Curie

Otto Hahn and Rutherford

23 / 56

Isotopes are atoms of same element with different _______

Atomic Mass

Number of Protons

Number of Electrons

Atomic Number

24 / 56

The mass of the proton and neutron is nearly equal to___________

• 1.67 x 10^-27 kg
• 1.67 x 10^-31 kg
• 1.67 x 10^-19kg
• 1.67 x 10^-21 kg

which Option is Correct ?

Option-2

Option-3

Option-1

Option-4

25 / 56

Which option is Correct

Option-1

Option-2

Option-3

Option-4

26 / 56

A nucleon is _________ times heavier than electron.

1827

1832

1841

1836

27 / 56

Tritium contains one proton, while protium and deuterium contains_________

Two Protons

One Protons

Three Protons

No Proton

28 / 56

In each fission reaction energy released__________

255meV

200MeV

299mV

210meV

29 / 56

Rutherford discovered that the positive charge in an atom was concentrated in a small region called__________

Nucleus

Shell

Molecule

Atom

30 / 56

Hazards of radiation for humans are_____________

Leukemia

All Given

Blindness

Sterility

31 / 56

____________ are collectively called nucleons.

neutrons in nucleus

Protons in nucleus

Protons and Neutrons in Nucleus

electrons in shell

32 / 56

Which have the greatest power of ionization s compared to others?

X-Rays

β-Particles

α-Particle

γ particles

33 / 56

The total number of protons in a nucleus or total number of electrons in the orbits is __________

Atomic Number

Atomic mass number

none of these

Isotope number

34 / 56

Charge on alpha particles is ________

5e

3e

2e

4e

35 / 56

Gamma rays are also called __________

Protons

Photons

Positrons

Electrons

36 / 56

When heavy nucleus splits into two lighter nuclei, the process would _____________

Release Nuclear Energy

Absorb Nuclear Energy

Absorb Chemical Energy

Release Chemical Energy

37 / 56

Stable nuclei have atomic number between__________

1-82

2-89

2-88

2-85

38 / 56

The half life of a certain isotope is 1 day. What is the quantity of the isotope after 2 days?

One Eight

One half

None of these

One Quarter

39 / 56

In order to find the intensity of radiations, which device can be used?

Dosimeter

Radiometer

Both "Film Badge" & "Dosimeter"

Film Badge

40 / 56

Isotopes of an element have the same____________

Colors

Chemical Properties

Atomic Number

Atomic Mass Number

41 / 56

One of the isotopes of uranium is U(238-92)  the number of neutrons in this isotope is ___________

330

238

146

92

42 / 56

In which simplest atom, nucleus has only one proton?

Nitrogen

Carbon

Helium

Hydrogen

43 / 56

The half-life of C-14 is ______

5202 Years

5700 Years

5730 Years

5720 Years

44 / 56

Atoms of the element which have same number of protons but different number of neutrons are__________

None of these

Both Isotopes & Nuclide

Nuclide

Isotopes

45 / 56

When two lights nuclei combine to form a heavier nucleus, this process is called_______

Nuclear Fusion

Disintegration

Bombardment

Nuclear Fission

46 / 56

The stable argon nuclide Ar-40 half life___________

• 2.4 x 10⁸ years
• 2.69 x 10⁴ years
• 2.5 x 10⁹ years
• 2.4 x 10¹¹ years

Which Option is Correct ?

Option-1

Option-3

Option-2

Option-4

47 / 56

The earth and all living things receive radiation from outer space which name is __________

X-Rays

None of these

Radon Gas

Cosmic Rays

48 / 56

During fission of 1kg of Uranium -235 energy released is ___________

• 67 x 10¹⁰J
• 65 x 10⁸J
• 60 x 10⁸J
• 66 x 10⁹J

Which Option is Correct ?

Option-1

Option-3

Option-2

Option-4

49 / 56

Mass energy equation and theory of relativity was given by___________

Quantum

Newton

Volta

Einstein

50 / 56

Which compound readily accumulated in the thyroid gland and can be used for monitoring of thyroid functioning?

1-131

1-132

1-130

1-129

51 / 56

Half-life of plutonium (236 96 Pu) is 2.85 years and 242 94 Pu is _____________

• 3.79 x 10⁵ years
• 7.1 x 10⁸ years
• 2.85 years
• 7.1 x 10¹⁰ years

Which Option is Correct ?

Option-1

Option-3

Option-2

Option-4

52 / 56

3

8

6

10

53 / 56

Which Option is Correct ?

Option-4

Option-2

Option-3

Option-1

54 / 56

The reason carbon dating works is that __________

When a plant or an animal die

Plants and animals are such strong emitters of carbon-14

There is so much non-radioactive carbon dioxide in the air

After plant of animal dies, it stops taking in fresh carbon-14

55 / 56

Release of energy by the sun is due to ________

Chemical Reaction

Nuclear Fission

Burnings of Gases

Nuclear Fusion

56 / 56

Which among the following radiations has more penetrating power?

An Alpha Particle

A Gamma Ray

A Beta Particle

All Have the Same Penetrating Capability

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Chapter wise PDF Notes / Problems / Numerical Solution of Physics

Chapter-10 – Simple Harmonic Motion and Waves

Chapter-11 – Sounds

Chapter-12 – Geometrical Optics 

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Chapter-14 – Current Electricity

Chapter-15 – Electromagnetism 

Chapter-16 – Basic Electronics 

Chapter-17 – Information Technology 

Chapter-18 – Atomic and Nuclear Physics

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