Related Questions

240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Which one is radioactive in nature?
A Helium
B Deuterium
C Heavy hydrogen
D Tritium
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of
A Segar cones
B Muffles for muffle furnaces
C Insulating bricks
D Crucibles used for melting of high purity metals
Which of the following types of nuclear reactors is most prone to radioactive hazards?
A Gas cooled reactor
B Molten Sodium Reactor
C Boiling water reactor
D Pressurised water reactor
Which of the following is NOT a radioactive element?
A Uranium
B Plutonium
C Titanium
D Thorium
Which among the following is a positively charged particle emitted by a radioactive element?
A Beta ray
B Alpha ray
C Cathode ray
D Gamma ray
Out of the following, which is not emitted by radioactive substance?
A Electrons
B Electromagnetic radiations
C Alpha particles
D Neutrons
Which of the following caused radioactive pollution along the coast of Kerala ?
A Plutonium
B Zinc
C Thorium
D Radium
Which of the following elements is non-radioactive ?
A Uranium
B Thorium
C Plutonium
D Zirconium

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