57
Q:

D.D.T. was invented by

A) Paul Muller B) John Dalton
C) Rudolf D) None of these

Answer:   A) Paul Muller



Explanation:

Swiss chemist Paul Hermann Muller discovered DDT (dichloro-diphenyl-trichloroethane) noted its effectiveness as a pesticide during World War II to control malaria and typhus among civilians and troops, a discovery that earned him a Nobel Prize in 1948.

 

It was first synthesized in the year 1874.

Subject: Inventions
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Q:

Find the missing number in the following series.
7, 10, 14, ?, 25, 32

 

A) 18 B) 19
C)  20 D) 15
 
Answer & Explanation Answer: B) 19

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Q:

_____ was the first host country of the FIFA (Federation Internationale de Football Association) World Cup.

 

A) Italy B) Uruguay
C) Brazil D)  France
 
Answer & Explanation Answer: B) Uruguay

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Q:

Humankind’s oldest mammal ancestor named Durlstotherim newmani has been discovered in ______.

 

A) West Indies B) India
C) United Kingdom D) China
 
Answer & Explanation Answer: C) United Kingdom

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0 54
Q:

In the following question, select the missing number from the given series.


97, 91, 79, 61, 37, ?

 

A) 9 B) 7
C) 1 D) 5
 
Answer & Explanation Answer: B) 7

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2 52
Q:

In the following question, select the missing number from the given series.


97, 91, 79, 61, 37, ?

 

A) 9 B) 7
C) 1 D) 5
 
Answer & Explanation Answer: B) 7

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Q:

Which of the numbers given below is NOT rational?

 

A) 324 B) 643
C) 325 D) 273
 
Answer & Explanation Answer: A) 324

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Q:

............. is an alkali metal.

 

A) Sodium B) Manganese
C) Aluminium D) Magnesium
 
Answer & Explanation Answer: A) Sodium

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Q:

Louis Pasteur was known for discovery of

A) Polio vaccine B) Chicken pox vaccine
C) Small pox vaccine D) Rabies vaccine
 
Answer & Explanation Answer: D) Rabies vaccine

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