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 General Science Questions

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Q:

Which one of the following types of laser is used in laser printers?

A) Semiconductor laser B) Dye laser
C) Gas laser D) Excimer laser
 
Answer & Explanation Answer: A) Semiconductor laser

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Q:

Which of the following parts of the sun is easily visible only during a total solar eclipse? 

A) core B) photosphere
C) sunspots D) corona
 
Answer & Explanation Answer: D) corona

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Q:

NASA successfully tested supersonic landing parachute in November 2017 for its approximate ______ mission.

 

A) Zuma 2020 B) GOLD
C) ICON D) Mars 2020
 
Answer & Explanation Answer: D) Mars 2020

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Q:

Potassium Permanganate is used for purifying drinking water, because

A) it is a sterilising agent B) it dissolves the impurities of water
C) it is a reducing agent D) it is an oxidising agent
 
Answer & Explanation Answer: D) it is an oxidising agent

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Q:

Which of the following has got more heat capacity?

A) Iron piece B) Water
C) Gold piece D) Benzene
 
Answer & Explanation Answer: B) Water

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Q:

______________ kills the germs present in the water.

 

A) Evaporation B) Rehydration
C) Boiling D) Desiccation
 
Answer & Explanation Answer: C) Boiling

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Q:

The gases used in different types of welding would include

A) oxygen and hydrogen B) oxygen and acetylene
C) oxygen, acetylene and argon D) oxygen, hydrogen, acetylene and nitrogen
 
Answer & Explanation Answer: B) oxygen and acetylene

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Q:

Which of the following foods does not support bacterial growth?

A) Raw carrots B) Sauted onions
C) Refried beans D) Cooked rice
 
Answer & Explanation Answer: A) Raw carrots

Explanation:

Cooked food create an enabling environment for bacteria to grow because of their moisture content & of the normal temperature of the food. 

raw_food_vs_cooked_food1591419246.png image

Raw food does not offer suitable conditions for bacteria growth. 

 

Hence, from the given options raw carrots does not support bacterial growth.

 

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