Nuclear physics

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

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

_____________ aprons are used to protect us from gamma radiations

Aluminium
Lead
Iron
Lead oxide

____________ isotope is used for the treatment of cancer.

Radio Carbon
Radio Nickel
Radio Cobalt
Radio Iodine

Gamma radiations are dangerous because

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

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

Artificial radioactivity was discovered by ____________

Becquerel
Neils Bohr
Roentgen
Irene Curie

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

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

Man-made radioactivity is also known as_____________

Induced radioactivity
Artificial radioactivit
a & c
Spontaneous radioactivity

Kamini reactor is located at __________

Mumbai
Rajasthan
Kalpakkam
Koodankulam

Proton - Proton chain reaction is an example of__________________

α - decay
Nuclear fission
Nuclear fusion
β - decay

Unit of radioactivity is _____________

all the above
roentgen
becquerel
curie