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Q:

Cobalt - 60 is commonly used in radiation therapy because it emits

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

Explanation:
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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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Filed Under: Chemistry

Q:

In atomic reactors,graphite is used as

A) lubricant B) fuel
C) linear of the ractor D) moderator
 
Answer & Explanation Answer: D) moderator

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Filed Under: Chemistry

Q:

When the nucleus of  Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called

A) nuclear fission B) nuclear fusion
C) physical change D) artificial radioactivity
 
Answer & Explanation Answer: A) nuclear fission

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Filed Under: Chemistry

Q:

The first indication that a stable nucleus can be broken down was afforded by

A) Rutherford B) Madam Curie
C) Soddy D) Schmidt
 
Answer & Explanation Answer: A) Rutherford

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Filed Under: Chemistry

Q:

A device used for the measurement of radioactivity is

A) mass spectrometer B) cyclotron
C) nuclear reactor D) G.M.counter
 
Answer & Explanation Answer: D) G.M.counter

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Q:

Shobha is the niece of Ashish. Ashish's mother is Priya. Kamla is Priya's mother. Kamla's husband is Hari. Krishna is the mother-in-law of Hari. How is Shobha related to Hari ? 

A) Daughter B) Great Grand daughter
C) Grandniece D) Great Grandson's daughter
 
Answer & Explanation Answer: B) Great Grand daughter

Explanation:

Shubha is the niece of Atthish means Ashish as the uncle of Shottha Now. Priyais Ashish's mother 

So, Priya is the grandmother of Shobha. Hari is Priya's father. So, Shobha is the great granddaughter of Hari. 

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Filed Under: Blood Relations

Q:

In a family, there are six members A, B, C, D, E and F. 

A and B are a married couple, A being the male member. D is the only son of C, who is the brother of A. E is the sister of D. B is the daughter-in-law of F, whose husband has died. How is F related to C ? 

A) Mother B) Sister
C) Aunt D) Sister-in-law
 
Answer & Explanation Answer: A) Mother

Explanation:

A is a male and married to B. So, A is the husband and B is the wife. C is the brother of A. D is the son of C. E, who is the sister of D will be the daughter of C. B is the daughter-in-law of F whose husband has died means F is the mother of A. 

F is the mother of A and C is the brother of A. So, F is the mother C. 

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Filed Under: Blood Relations