The source of energy in a cellular reaction is

1.  chemical energy

2.  light energy

3.  heat energy

4.  solar radiation

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4
Correct Answer :

chemical energy


Explanation :
No Explanation available for this question

Nitrogenous base that is found in RNA but absent in DNA is

1.  Uracil

2.  Thymine

3.  Cytosine

4.  Adenine

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4
Correct Answer :

Uracil


Explanation :
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Which of the following is an example of induced radioactivity

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

In nucelar reactors, the moderator is

1.  Cadmium

2.  Uranium-235

3.  Uranium-238

4.  Heavy water

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4
Correct Answer :

Heavy water


Explanation :
No Explanation available for this question

If in the reaction of fluorine-19 with a neutron nitrogen-16 is formed, what is the other particel given off in the reaction

1.  10n

2.  42He

3.  10e

4.  11H

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4
Correct Answer :

42He


Explanation :
No Explanation available for this question

A radioactive substance having a half life period of 3 days was received after 12 days. It was found that there was 3 g of the isotope in the container. The initial weight of the isotope when placed was

1.  12 g

2.  24 g

3.  36 g

4.  48 g

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4
Correct Answer :

48 g


Explanation :
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Eight grams of a radioactive susbtance is reduced to 0.5 g after 1 hour. The half life period of the radioactive substance is

1.  15 min

2.  30 min

3.  45 min

4.  10 min

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4
Correct Answer :

15 min


Explanation :
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1.  proton

2.  deutron

3.  γ-rays

4.  neutron

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4
Correct Answer :

γ-rays


Explanation :
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The artificial radioactivity was first discovered by

1.  Rutherford

2.  Sea Borg

3.  Einstein

4.  Irene Curie

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4
Correct Answer :

Sea Borg


Explanation :
No Explanation available for this question

Which of the following is not a transuranic element

1.  Pu

2.  Bi

3.  Cm

4.  Am

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4
Correct Answer :

Bi


Explanation :
No Explanation available for this question
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