Radioactivity Class 10 ICSE Physics MCQ Questions
Looking for Radioactivity Class 10 ICSE Physics Chapter 12 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 physics Chapter 12 multiple choice questions and answers. All MCQ are important.
1) The maximum number of electrons in a shell is
a) 2n^2.
b) 3n^2
c) 4n² ‘d) n²
Ans- Option (a)
2) The charge of an electron is
a)+1.6 × 10^-19C
b)-1.6 × 10^-19C
c)1.67 × 10^-27C
d) 1·3 x10^-19C
Ans-option (b).
3) The sum of proton and neutron present in an atom of an element is called
a) Atomic number
b) Atomic number
c) Mass number
d) Both (b) & (c)
Ans- option (d)
4)The correct group of isotopes of chlorine is
a) 36 38
Cl Cl
17 17
b) 35 37
Cl Cl
17 17
c) 30 31
Cl Cl
17 17
d) 32 33
Cl Cl
17 17
Ans- option (b)
5) Same number of nucleons but different number of proton is
a) Isotopes
b) Isotones
c) Isobars
d) None of these
Ans-option (c)
6) An alpha particle consists of
a) Two proton & neutron
b) One proton & neutron
c)Three proton & neutron
d) four proton & neutron
Ans- Option (a)
7) Which is incorrect about alpha particles
a) These are positively charged
b) They have large kinetic energy
c) The speed of alpha particles is 10^8 m/s
d) alpha particles affect a photographic plate
Ans-Option (c)
8) The penetrating power of Beta particles is
a) more than alpha- particles
b) more than gamma-radiation
c) less than α- particles d) Both (a) & (b). Ans-option (a)
9) The ionising power of gamma radiation is
a) high
b) low
c) medium
d) none of these
Ans-Option (b)
10) In emission of gamma radiation there is
a) chang in number of proton
b) Change in number of neutron
c) change in number of protons and neutron
d) change in energy of nucleus
Ans-option (d)
11) Which is incorrect about beta particles
a) the speed of beta particle is 10^8 m/s.
b) The number of neutron is increased by one.
c) The number of proton is increased by one
d) They are negatively charged.
Ans-option (b)
12) Which is used in cure of cancer & detecting brain tumour
a) sodium -24
b) Iron-59
c) cobalt-60
d) None of these
Ans-Option (c).
13) Alpha particles have kinetic energy
a) large. b)small
c)no change
d) Both (a) and (b)
Ans- option (a)
14) A certain nucleus has a mass number 12 and atomic number 8. Find the number of neutrons
a) 3
b) 5
c) 6
d) 4
Ans-option (d)
Number of neutron
= mass number – atomic number
=12-8
=4
15) 1 a.m.u of mass is equivalent to
a) 932 MeV
b) 930 MeV
c) 931MeV
d) 940MeV
Ans-option (c)
16) The process in which a heavy nucleus divided into two lighter nuclei is a) Nuclear fission
b) Nuclear fusion
c) Radioactivity
d) Both (a) & (b)
Ans- Option (a)
17) The proces in which two lighter nuclei combined together to form a heavy nucleus is a) Nuclear fission
b) Radioactivity
c) Nuclear fusion
d)Both (a) & (b)
Ans- option (c)
18) The thermo- nuclear reaction converts hydrogen into
a) oxygen.
b)helium
c) Uranium
d) barium
Ans-option (b)
19) Which of the following isotopes of uranium is unstable
a) U-234
b) U-238
c) U-235
d) All the above
Ans- option(d)
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