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Q:

What enables an electric current to flow in a circuit?

 

A) The motion of electrons B) The motion of neutrons
C) The motion of positrons D) The motion of protons
 
Answer & Explanation Answer: A) The motion of electrons

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Filed Under: Chemistry
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Q:

The most reactive of the following metals is

 

A) Al B) Ca
C) Ni D) Pb
 
Answer & Explanation Answer: B) Ca

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Filed Under: Chemistry
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Q:

Which of the following is based on the principle of nuclear fusion?

 

A) Atomic bomb B) Hydrogen bomb
C) Both Atomic and Hydrogen bomb D) No option is correct
 
Answer & Explanation Answer: B) Hydrogen bomb

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Filed Under: Physics
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1 58043
Q:

Water which is suitable for drinking is called _______________ water.

 

A) hygienic B) sparkling
C) potable D) sanitary
 
Answer & Explanation Answer: C) potable

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Q:

Photosynthesis fulfills which of the following requirements of the autotrophic organisms?

I. Carbon

II. Water

III. Energy

A) Only I B) Only III
C) I and III D) All I, II and III
 
Answer & Explanation Answer: C) I and III

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Filed Under: Biology
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Q:

Which is released during the formation of a peptide bond?

 

 

A) an amino group B) a five-carbon sugar
C) both 1 and 2 D) a water molecule
 
Answer & Explanation Answer: D) a water molecule

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Q:

Mass number is always equal to ______.

 

A) number of protons B) number of neutrons
C) sum of number of protons and number of electrons D) sum of number of protons and number of neutrons
 
Answer & Explanation Answer: D) sum of number of protons and number of neutrons

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Q:

Find the work done (in J) when a charge of 20 C moves across a potential difference of 4 V.

 

 

A) 5 B) 40
C) 80 D) 10
 
Answer & Explanation Answer: C) 80

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