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Q:

What element is found in all organic compounds?

A) Hydrogen B) Calcium
C) Nitrogen D) Carbon
 
Answer & Explanation Answer: D) Carbon

Explanation:

Carbon is found in all organic compounds.

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Filed Under: Chemistry
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Q:

A boy is swinging a ball attached to a string in a horizontal circle.If the string snaps

A) the ball will travel towards the center of the circle and fall down B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C) it will fall down at the same place where the string breaks D) none of these
 
Answer & Explanation Answer: B) it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Explanation:

The centripetal force having  been removed the body cannot execute the curved path. (B) is Correct.

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Q:

Which of the following groups is/are called phanerogams?

 

I. Thallophyte

II. Bryophyte

III. Pteridophyle

 

A) Only I B) Only II
C) All I, II and II D) No option is correct
 
Answer & Explanation Answer: D) No option is correct

Explanation:
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Filed Under: Biology
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Q:

The atoms of the elements which have same number of neutrons are called

A) Isobars B) Isotopes
C) Isotones D) None
 
Answer & Explanation Answer: C) Isotones

Explanation:
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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

Explanation:
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Q:

Which factor affects the speed of an inkjet printer?

A) the quality of the paper B) the cost of the inkjet cartridges
C) the size of printer power supply D) the desired quality of the image
 
Answer & Explanation Answer: D) the desired quality of the image

Explanation:

The speed of an inkjet printer is determined mostly by the make and model of the printer, the quality of printing, and the complexity of the image. The quality of the paper, the cost of the cartridges, and the size of the power supply do not affect the speed of printing.

 

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Filed Under: Computer
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Q:

Each model of a computer has a unique

A) High level language B) Assembly language
C) Both A & B D) Machine language
 
Answer & Explanation Answer: D) Machine language

Explanation:

Each model of a computer has a unique machine language.

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Q:

Lightning is produced when 

A) Similar charges of electricity rush towards each other and then get repelled B) clouds strike against impurities in air and the friction burns up these impurities
C) strong opposite charges in different clouds break down the resistance offered by the intervening air D) water vapour produces electricity in the clouds
 
Answer & Explanation Answer: C) strong opposite charges in different clouds break down the resistance offered by the intervening air

Explanation:

When the resistance of the air between breaks down the current flows from the positive cloud to the negative cloud in a flash which we call lightning . The difference of potential involves is very high.

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Filed Under: Physics

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