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Q:

 What item, originally called the ‘Whirlwind’, was invented by Ives McGaffey in 1869?

A) Blender B) Electric mixer
C) Washing machine D) Vacuum cleaner
 
Answer & Explanation Answer: B) Electric mixer

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Q:

What Frank Whittle invented?

A) Radar B) Ethyl gasoline
C) Sonar D) Jet propulsion
 
Answer & Explanation Answer: D) Jet propulsion

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Q:

FROZEN FOOD – Who discovered the first practical method of freezing food?

A) C. Birdseye B) F. Rozenosh
C) G. Findus D) R. Scott
 
Answer & Explanation Answer:

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Q:

Who invented fuel cells in 1839?

A) Buckminster Fuller B) Sir William Grove
C) Sylvester Graham D) Joyce Hall
 
Answer & Explanation Answer: B) Sir William Grove

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Q:

Roentgen discovered

A) Electrocardiograph B) X–rays
C) Anti polio vaccine D) Encephalograph
 
Answer & Explanation Answer: B) X–rays

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Q:

Streptomycin was invented by

A) Fleming B) Marie Curie
C) Walksman D) None of these
 
Answer & Explanation Answer: C) Walksman

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Q:

Bushwell invented

A) Atomic Bomb B) Submarine
C) Urey D) Hovercraft
 
Answer & Explanation Answer: B) Submarine

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Q:

D.D.T. was invented by

A) Paul Muller B) John Dalton
C) Rudolf D) None of these
 
Answer & Explanation 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.

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