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SET-1
SET-2
SET-3
SET-4
SET-5
1.
Nuclei of radioactive is
A.
Either protons or neutrons
B.
Neither protons nor neutrons
C.
Neutrons
D.
Protons
Answer :
Answer & Solution
2.
In the solar spectrum Fraunhofer lines are seen in the sodium D wavelength. This proves
A.
There is no sodium in the atmosphere
B.
There is sodium in the solar atmosphere
C.
There is no sodium in the sun
D.
There is no sodium in sun’s interior
Answer :
Answer & Solution
3.
The nucleus of an element X84202 emits an α particles and then a β particle. The final nucleus formed has an atomic number
A.
80
B.
82
C.
83
D.
198
Answer :
Answer & Solution
4.
The unit of radioactivity is
A.
Curie
B.
Einstein
C.
Plank
D.
None
Answer :
Answer & Solution
5.
The half life of a substance is 0 days. How much of the substance will be left after 40 days if the initial mass is 2 gm
A.
0.0125gm
B.
1.25gm
C.
0.125gm
D.
5gm
Answer :
Answer & Solution
6.
Which one of the following is not a radioactive element?
A.
Radium
B.
Uranium
C.
Thorium
D.
Cadmium
Answer :
Answer & Solution
7.
Which of the following is a radioactive element?
A.
Uranium
B.
Chromium
C.
Cobalt
D.
Argon
Answer :
Answer & Solution
8.
The unstability of a nucleus is due to
A.
Low electron to proton ratio
B.
Low neutron to electron ratio
C.
Higher electron to proton ratio
D.
High neutron to proton ratio
Answer :
Answer & Solution
9.
Which of the following is radioactive?
A.
Strontium
B.
Thorium
C.
Cesium
D.
Platinum
Answer :
Answer & Solution
10.
An element that does not occur in nature but can be produced artificially is
A.
Plutonium
B.
Uranium
C.
Thorium
D.
Radium
Answer :
Answer & Solution
11.
Which of the following elements does not exhibit nature radioactivity?
A.
Aluminium
B.
Polonium
C.
Uranium
D.
Thorium
Answer :
Answer & Solution
12.
Which of the following is a radioactive element?
A.
Chromium
B.
Argon
C.
Cobalt
D.
Uranium
Answer :
Answer & Solution
13.
The lightest radioactive element is
A.
Tritium
B.
Uranium
C.
Deuterium
D.
Polonium
Answer :
Answer & Solution
14.
Which of the following elements is not radioactive?
A.
Uranium
B.
Zirconium
C.
Radium
D.
Plutonium
Answer :
Answer & Solution
15.
There is no change in radioactive element (mass or charge) during
A.
Beta emission
B.
Alpha emission
C.
Gamma emission
D.
Oxidation
Answer :
Answer & Solution
16.
The nuclear force are
A.
Charge symmetric
B.
Long range
C.
Charge independent
D.
Spin Independent
Answer :
Answer & Solution
17.
Which of the following caused radioactive pollution along the coast of Kerala?
A.
Plutonium
B.
Thorium
C.
Zinc
D.
Radium
Answer :
Answer & Solution
18.
Radioactive Noble Gas is
A.
Ne
B.
Xe
C.
HE
D.
Rn
Answer :
Answer & Solution
19.
Radioactive samples are stored in lead boxes. Lead is used because it is
A.
Good absorber
B.
Bad conductor
C.
Heavy
D.
Strong
Answer :
Answer & Solution
20.
Radioactive element emit
A.
Infrared waves
B.
Ultraviolet waves
C.
Radio waves
D.
None of these
Answer :
Answer & Solution
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