General Science Questions and Answers | General Knowledge

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1.

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

   A.) sunspots
   B.) corona
   C.) photosphere
   D.) core

Answer: Option 'B'

​corona

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2.

Potassium Permanganate is used for purifying drinking water, because

   A.) it is a sterilising agent
   B.) it is a reducing agent
   C.) it dissolves the impurities of water
   D.) it is an oxidising agent

Answer: Option 'D'

it is an oxidising agent

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3.

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

   A.) Sodium bicarbonate
   B.) Sodium nitrite
   C.) Sodium azide
   D.) Sodium peroxide

Answer: Option 'C'

​Sodium azide

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4.

In fireworks, the green flame is produced because of

   A.) Sodium
   B.) Potassium
   C.) Barium
   D.) Mercury

Answer: Option 'C'

​Barium

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5.

As you go down into a well, your weight

   A.) increases slightly
   B.) remains exactly the same
   C.) decreases slightly
   D.) None of the above

Answer: Option 'C'

decreases slightly

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6.

The weight of an object will be minimum when it is placed at?

   A.) The Equator
   B.) The North Pole
   C.) The South Pole
   D.) The center of the Earth

Answer: Option 'D'

The weight of an object is minimum when it is placed at the center of the earth because when an object is in the center, it experiences gravitational pull from all directions.

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7.

The blue colour of the clear sky is due to

   A.) Reflection of light
   B.) Diffraction of light
   C.) Dispersion of light
   D.) Refraction of light

Answer: Option 'C'

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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8.

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

   A.) Infra-red waves
   B.) Microwaves
   C.) Radio waves
   D.) None of the above

Answer: Option 'A'

​Infra-red waves

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9.

Which of the following is used in pencils?

   A.) Graphite
   B.) Charcoal
   C.) Phosphorous
   D.) Silicon

Answer: Option 'A'

Graphite

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10.

A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is

   A.) O positive
   B.) A positive
   C.) B positive
   D.) Cannot be determined on the basis of the given data

Answer: Option 'A'

O positive

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