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 General Science Questions

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Q:

The core of the earth is also known as ______

A) Lithosphere B) Mesosphere
C) Barysphere D) Centrosphere
 
Answer & Explanation Answer: C) Barysphere

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Q:

How much time does a Geostationary satellite take to complete one orbit, at the height of 35790 km?

A) 30 days B) 24 hours
C) 365 days D) 12 hours
 
Answer & Explanation Answer: B) 24 hours

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Q:

Azolla increases soil fertility for ....

A) maize cultivation B) wheat cultivation
C) barley cultivation D) rice cultivation
 
Answer & Explanation Answer: D) rice cultivation

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Q:

In December 2015, NASA's Curiosity Mars rover found the presence of ____, which will help scientists learn about the ancient wet environment.

A) Magnesium B) Cadmium
C) Silica D) Calcium
 
Answer & Explanation Answer: C) Silica

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Q:

Which one of the following gases is released mostly from landfills in urban areas?

A) Nitrogen B) Hydrogen
C) Methane D) Oxygen
 
Answer & Explanation Answer: C) Methane

Explanation:

Decomposing waste in the landfills, by the action of microorganisms, produce methane and carbon dioxide. Landfill gas consists of 40-60% of methane and rest is carbon dioxide. Trace amount of volatile organic compounds (<1) are also present which mainly comprise of hydrocarbons.

 

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Q:

A solar cell is made up of:

A) Carbon B) Gallium
C) Silicon D) Teflon
 
Answer & Explanation Answer: C) Silicon

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Q:

What are proteins made from?

A) Nucleotides B) Nucleic acids
C) Aminoacids D) Ethylene
 
Answer & Explanation Answer: C) Aminoacids

Explanation:

Proteins are made from chain of aminoacids.

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Q:

Scanning means that the reader

A) reads every single word of the article. B) searches for the most important details.
C) looks for words to catch his or her attention. D) focuses on the text's conclusion.
 
Answer & Explanation Answer: B) searches for the most important details.

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