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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:

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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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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2 45647
Q:

An electron loses potential energy when it

 

A) shifts to a more electronegative atom. B) increases its kinetic energy.
C) shifts to a less electronegative atom. D) increases its activity as an oxidizing agent.
 
Answer & Explanation Answer: A) shifts to a more electronegative atom.

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Filed Under: Chemistry
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1 45594
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:

Elements having same atomic numbers but different mass number are called ______.

 

 

A) isotones B) Isotopes
C) isomopes D) isobar
 
Answer & Explanation Answer: B) Isotopes

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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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11 45573
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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Filed Under: World Geography

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