Alpha Particles MCQs
In process of radioactive decay some high energetic particles are emitted. These particles have high frequency. The alpha particles are positively charged particles. When both electrons from helium are removed it considered as α-particle. Its mass is 6.64 x 10-27 kg and charge is + 3.2 x 10-19 coulomb. The range of – particles through air varies from 2.7 cm to 8.62 cm for thorium.
Go through the following reaction;
Let’s discuss more about alpha particles with help of following MCQs.
Q.1) During emission of α– particlesfrom radioactive atom the atomic number decreases by…
a) 1
b) 2
c) 3
d) 4)
Q.2) During emission of α– particles from radioactive atom the atomic mass decreases by…
a) 1
b) 2
c) 3
d) 4)
Q.3) What is the total charge on α– particles?
a) + 3.2 x 10-19 C
b) – 3.2 x 10-19 C
c)+ 1.6 x 10-19 C
d)-1.6 x 10-19 C
Q.4) The total mass of α– particles is….
a) 6.64 x 10-27 kg
b) 3.32x 10-27 kg
a) 2.22x 10-27 kg
d) 1.67x 10-27 kg
Q.5) The nuclei that undergoes decay is known as…
a) father nuclei b) mother nuclei
c) parent nuclei d) guardian nuclei
Q.6) The nucleus produced after the process of radioactive decay is known as…
a) daughter nuclei b) son nuclei
c) product nuclei d) biproduct nuclei
Q.7) Which among the following is correct for α– particles?
a) α– particles do not gets deflected by electric and magnetic field.
b α–particles produce fluorescence when strikes on photographic plate.
c) They travels faster than light.
d) all above are correct for the α– particles.
Q.8) Which among the following is correct for α– particles?
Q.9) Which among the following scatter the beam of α– particles when strikes on its foil?
a) aluminium
b) mica
c) gold
d) all of these
Q.10) In α– decay from Bismuth (Parent nuclei) with A=212 and Z= 83, the daughter nuclei will have……
a) A=210 and Z= 81
b) A=208 and Z= 81
c) A=210 and Z= 79
d) A=208 and Z= 79
Q.11) Which among the following is not correct for α– particles?
a) They ionize gas when passed through gas.
b) They affect photographic plate.
c) They are scattered when incident on aluminium.
d) They are neutral hence not deflected by electric and magnetic field.
Answers:
Q.1) b) 2
Q.2) d) 4
Q.3) a) + 3.2 x 10-19 C
Q.4) a) 6.64 x 10-27 C
Q.5) c) parent nuclei
Q.6) a) daughter nuclei
Q.7) b) α– particles produce fluorescence when strikes on photographic plate.
Q.8) a)
Q.9) d) all of these
Q.10) b) A=208 and Z= 81
Q.11) d) They are neutral hence not deflected by electric and magnetic field.
