Chapter 1: Atomic & Nuclear Physics Mcqs for High School - Grade 10 - Set 3

1)   Nuclei which do not emit radiations naturally are called

a. unstable nuclei
b. stable nuclei
c. positive nuclei
d. negative nuclei
Answer  Explanation 

ANSWER: stable nuclei

Explanation:
No explanation is available for this question!


2)   The chemical compounds to explore the metabolism of chemical reactions inside the human body, animals or plants containing some quantity of radioisotopes are called

a. radioactive endoscope
b. radioactive tracers
c. radioactive fusion
d. radioactive atoms
Answer  Explanation 

ANSWER: radioactive tracers

Explanation:
No explanation is available for this question!


3)   The matter is built from small particles called

a. radiant
b. atoms
c. isotopes
d. ions
Answer  Explanation 

ANSWER: atoms

Explanation:
No explanation is available for this question!


4)   Nuclei bombarded with protons, neutron or alpha particles are changed to

a. isotopes
b. radioisotopes
c. element having atomic number less than 82
d. none of above
Answer  Explanation 

ANSWER: radioisotopes

Explanation:
No explanation is available for this question!


5)   The types of radiations emitted by the radioactive substance are

a. 2
b. 4
c. 5
d. 3
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


6)   The artificially produced radioactive elements are known as

a. ions
b. radiant
c. radioisotopes
d. transmutations
Answer  Explanation 

ANSWER: radioisotopes

Explanation:
No explanation is available for this question!


7)   The rate of radioactive decay is proportional to the number of

a. unstable nuclei
b. unstable protons
c. unstable electrons
d. unstable atoms
Answer  Explanation 

ANSWER: unstable nuclei

Explanation:
No explanation is available for this question!


8)   During the second half-life, the original material is decayed

a. one quarter
b. two quarter
c. three quarter
d. all of above
Answer  Explanation 

ANSWER: three quarter

Explanation:
No explanation is available for this question!


9)   The rate of radioactive decay is proportional to

a. nature of rays
b. no. of electron
c. no. of protons
d. no. of unstable nuclei
Answer  Explanation 

ANSWER: no. of unstable nuclei

Explanation:
No explanation is available for this question!


10)   In nuclear fusion, as compared to the masses of original nuclei, the final nucleus is always

a. equal
b. equal
c. less
d. zero
Answer  Explanation 

ANSWER: less

Explanation:
No explanation is available for this question!


11)   The mass of neutron and proton is

a. equal
b. unequal
c. zero
d. undetermined
Answer  Explanation 

ANSWER: equal

Explanation:
No explanation is available for this question!


12)   In the atmosphere, a small amount is present of radioactive

a. carbon-15
b. carbon-19
c. carbon-10
d. carbon-14
Answer  Explanation 

ANSWER: carbon-14

Explanation:
No explanation is available for this question!


13)   Radiation that causes redness and sores on the skin is

a. gamma only
b. beta only
c. alpha
d. gamma and beta
Answer  Explanation 

ANSWER: gamma and beta

Explanation:
No explanation is available for this question!


14)   The radiations emitted by different elements are

a. alpha
b. beta
c. gamma
d. all of above
Answer  Explanation 

ANSWER: all of above

Explanation:
No explanation is available for this question!


15)   In the air, the beta particle has a range of

a. few centimeters
b. several thousand meters
c. several hundred meters
d. several meters
Answer  Explanation 

ANSWER: several meters

Explanation:
No explanation is available for this question!


16)   Nucleons are a collection of

a. electrons and protons
b. electrons and neutrons
c. protons and neutrons
d. protons and positrons
Answer  Explanation 

ANSWER: protons and neutrons

Explanation:
No explanation is available for this question!


17)   Times a proton is heavier than an electron is

a. 1827
b. 1876
c. 1836
d. 1789
Answer  Explanation 

ANSWER: 1836

Explanation:
No explanation is available for this question!


18)   The temperature at the center of the Sun is nearly

a. 20 million Kelvin
b. 10 million Kelvin
c. 30 million Kelvin
d. 25 million Kelvin
Answer  Explanation 

ANSWER: 20 million Kelvin

Explanation:
No explanation is available for this question!


19)   Ashes from a fire in the forest show carbon-14 activity of only 1/8 the activity of fresh wood. How long ago the forest had fire?

a. 18590 years
b. 17190 years
c. 16580 years
d. 14820 years
Answer  Explanation 

ANSWER: 17190 years

Explanation:
No explanation is available for this question!


20)   The release of energy from the sun is due to

a. nuclear fission
b. nuclear fusion
c. burning of gases
d. chemical reaction
Answer  Explanation 

ANSWER: nuclear fusion

Explanation:
No explanation is available for this question!