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Q:

Which one of the following is not radioactive

A) Astanine B) Francium
C) Tritium D) Zirconium
 
Answer & Explanation Answer: D) Zirconium

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Filed Under: Chemistry

Q:

' Yellow cake ' an item of smuggling across border s

A) A crude form of heroin B) A crude form of cocaine
C) Uranium oxide D) Unrefined gold
 
Answer & Explanation Answer: C) Uranium oxide

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Filed Under: Chemistry

Q:

Which one of the following can be used to confirm wether drinking water contains a gamma emitting isotope or not

A) Microscope B) Scintillation counter
C) Lead plate D) pectrophotometer
 
Answer & Explanation Answer: B) Scintillation counter

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Q:

Which of the following is a radioactive element

A) Sulphur B) Polonium
C) Tellurium D) Selenium
 
Answer & Explanation Answer: B) Polonium

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Q:

In nuclear reactor the speed of neutrons is slowed down by

A) heavy water B) ordinary water
C) Zinc rods D) molten caustic soda
 
Answer & Explanation Answer: A) heavy water

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Q:

Which of the following does not contain the material particles

A) alpha - rays B) beta - rays
C) gamma - rays D) anode rays
 
Answer & Explanation Answer: C) gamma - rays

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Q:

Of the following radiations, the most easily stopped by air

A) alpha - rays B) beta - rays
C) gamma -rays D) x - rays
 
Answer & Explanation Answer: A) alpha - rays

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Q:

  I. A, B, C, D, E and F are six members of a family. 

 II. One couple has parents and their children in the family. 

 III. A is the son of C and E is the daughter of A. 

 IV. D is the daughter of F who is the mother of E. 

Which of the following pairs is the parents of the children ? 

A) BC B) CF
C) AF D) cant be determined
 
Answer & Explanation Answer: C) AF

Explanation:

E is the daughter of A and F is the mother of E. So, A is the father of E and hence the husband of F. Now, 

D is the daughter of F. So, D and E are the daughters of A and F Also. A is the son of C. 

Now, only B remains. Thus, B and C are the parents of A. 

Clearly, A and F are the parents of the children D and E. 

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Filed Under: Blood Relations