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Q:

Who invented logarithms?

A) Mandeleef B) Shockley
C) Amundson D) John Napier
 
Answer & Explanation Answer: D) John Napier

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Filed Under: Inventions

Q:

Telegrahic code was introduced by

A) Lipman B) Macmillan
C) Thomas Moore D) Cockrell
 
Answer & Explanation Answer: C) Thomas Moore

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Filed Under: General Awareness

Q:

Analytical Engine was invented by

A) Dewar B) Charles Babbage
C) Daimler D) None of these
 
Answer & Explanation Answer: B) Charles Babbage

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Filed Under: Inventions

Q:

What does airbag, used for safety of car driver, contain?

A) Sodium bicarbonate B) Sodium azide
C) Sodium nitrite D) Sodium peroxide
 
Answer & Explanation Answer: B) Sodium azide

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Filed Under: General Science

Q:

Which of the following plants is not capable of manufacturing own food?

A) Algae B) Mushroom
C) Carrot D) Cabbage
 
Answer & Explanation Answer: B) Mushroom

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Filed Under: General Science

Q:

Which one of the following types of waves are used in a night vision apparatus?

A) Radio waves B) Microwaves
C) Infra-red waves D) None of the above
 
Answer & Explanation Answer: C) Infra-red waves

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Filed Under: General Science

Q:

Persons with which blood group are called universal donors?

A) AB B) A
C) O D) B
 
Answer & Explanation Answer: C) O

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Filed Under: General Science

Q:

The blue colour of the clear sky is due to

A) Diffraction of light B) Dispersion of light
C) Reflection of light D) Refraction of light
 
Answer & Explanation Answer: B) Dispersion of light

Explanation:

A clear cloudless day-time sky is blue because molecules in the air dissipate blue light from the sun more than they dissipate red light. When we look towards the sun at sunset, we see red and orange hues on the grounds because the blue light has been scattered out and away from the line of sight.

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Filed Under: General Science
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