Nuclear physics

Which of the following statements is/are correct?

(i) α particles are photons
(ii) Penetrating power of γ radiation is very low
(iii) Ionization power is maximum for α rays
(iv) Penetrating power of γ radiation is very high

(iv) only correct
(i) & (ii) are correct
(iii) & (iv) are correct
(ii) & (iii) are correct

____________ isotope is used for the treatment of cancer.

Radio Cobalt
Radio Iodine
Radio Nickel
Radio Carbon

Kamini reactor is located at __________

Kalpakkam
Koodankulam
Rajasthan
Mumbai

Gamma radiations are dangerous because

it produces enormous amount of heat
it affects tissues
it produces genetic disorder
it affects eyes & bones

Unit of radioactivity is _____________

roentgen
all the above
becquerel
curie

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

(i) α decay (ii) β decay
(iii) γ decay (iv) neutron decay

(ii) & (iv) are correct
(i) & (iv) are correct
(ii) and (iii) are correct
(i) is correc

_____________ aprons are used to protect us from gamma radiations

Aluminium
Iron
Lead
Lead oxide

Which of the following is/are correct?

(i) Chain reaction takes place in a nuclear
reactor and an atomic bomb.
(ii) The chain reaction in a nuclear reactor is
controlled
(iii) The chain reaction in a nuclear reactor is not
controlled
(iv) No chain reaction takes place in an atom
bomb

(iii) & (iv) are correct
(i) & (ii) are correct
(i) only correct
(iv) only correct

Proton - Proton chain reaction is an example of__________________

β - decay
Nuclear fusion
Nuclear fission
α - decay

Man-made radioactivity is also known as_____________

Induced radioactivity
a & c
Spontaneous radioactivity
Artificial radioactivit

Artificial radioactivity was discovered by ____________

Neils Bohr
Roentgen
Irene Curie
Becquerel