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 General Science Questions

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Q:

Which one of the following air pollutants combines with the haemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death?

A) Chlorofluorocarbon B) Fly ash
C) Carbon monoxide D) Sulphur dioxide
 
Answer & Explanation Answer: C) Carbon monoxide

Explanation:

Carbon monoxide (CO) is very dangerous because it binds with the haemoglobin more efficiently than oxygen does. It "hogs the seats" so that oxygen can't get a ride. And those CO molecules keep riding around, never giving their seats up to the oxygen. This means there is no way to get oxygen to the brain, heart, or other cells and those cells start to die. And finally, it leads to suffocation and even death of a person.

 

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Q:

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that ______.

A) the food is not cooked completely B) the fuel is not burning completely
C) the fuel is wet D) the fuel is burning completely
 
Answer & Explanation Answer: B) the fuel is not burning completely

Explanation:
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Q:

The largest source of pollution in the world is

A) herbicides and insecticides B)  Automobile exhausts
C) Sewage and garbage D)  Industrial effluents
 
Answer & Explanation Answer: C) Sewage and garbage

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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

Explanation:
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Q:

Which of the following has maximum bio-diversity?

A) Desert B) River
C) Polar Region D) Tropical Region
 
Answer & Explanation Answer: D) Tropical Region

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Q:

Rayon is obtained from which among the following?

A) Silk B) Wood pulp
C) Wool D) Cotton
 
Answer & Explanation Answer: B) Wood pulp

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Q:

Which atmospheric layer contains ozone layer?

A) Genosphere B) Zonosphere
C) Stratosphere D) Ionosphere
 
Answer & Explanation Answer: C) Stratosphere

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Q:

Fruits preserved in cold storage last longer because -

A) exposure to humidity is increased B) more oxygen is available
C) fruits are stored in a dark place D) the rate of respiration of Fruits is decreased
 
Answer & Explanation Answer: D) the rate of respiration of Fruits is decreased

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