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Q:

Which of the following statements are CORRECT?

I. Esters are sweet smelling substance.
II Esters are used in making perfumes.
III. Functional group of ester is R-O-RꞋ.

 

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

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Filed Under: Chemistry
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Q:

Match the correct Memory units.

 

 

A) a-r, b-p, c-s, d-q B) a-p,b-s, c-q, d-r
C) a-r, b-s, c-q, d-p D) a-r, b-q, c-s, d-p
 
Answer & Explanation Answer: A) a-r, b-p, c-s, d-q

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Filed Under: Computer
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Q:

The relative humidity of a region is low when :

 

A) The wet and dry bulb thermometers read the same B) The difference between the readings of the wet and dry bulb thermometers is large
C) The temperature are high D) The temperatures are low
 
Answer & Explanation Answer: B) The difference between the readings of the wet and dry bulb thermometers is large

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Q:

Who first discovered the every eighth element had properties similar to that of the first?

 

A) Newlands B) Moseley
C) Dobereiner D) Mendeleev
 
Answer & Explanation Answer: A) Newlands

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Filed Under: Chemistry
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Q:

Plants of which group are predominantly aquatic?

 

A) Thallophyta B) Bryophyta
C) Pteridophyta   D) No option is correct
 
Answer & Explanation Answer: A) Thallophyta

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Filed Under: Biology
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Q:

The relative density of a substance is the ____.

 

A) ratio of its density to the density of water B) ratio of the density of water to its density
C) product of the density of water to its density D) ratio of the volume of water to its volume
 
Answer & Explanation Answer: A) ratio of its density to the density of water

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Filed Under: Physics
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Q:

Storage capacity of magnetic disk depends on

A) disk pack in disk surface B) tracks per inch of surface
C) bits per inch of tracks D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Magnetic disk is a kind of data storage device. Storage capacity of magnetic disk depends on 

1. tracks per inch of surface

2. bits per inch of tracks

3. disk pack in disk surface

 

It can be shown as ::

 

magnetic_disc1532069041.jpg image

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Filed Under: Computer
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136 45137
Q:

What is formed when helium atom loses one electron?

 

A) Proton B) Positive helium ion
C) Negative helium ion D) Alpha particle
 
Answer & Explanation Answer: B) Positive helium ion

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