Tag: air and atmosphere

Questions Related to air and atmosphere

Which of the following is potable water?

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. A glass of water fit for drinking

  2. Water in a pot

  3. Sea water

  4. Water with bacteria and chemicals

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Correct Option: A
Explanation:

A glass of water is fit for drinking. Water in a pot may contain impurities like dust, sand, etc. Sea contains huge number of impurities including huge levels of salts and water with bacteria and chemicals and is not preferred for drinking. 

How much of the Earth's surface is covered with water?

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. About two-third

  2. About one-fourth

  3. About three-fourth

  4. About one-third

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Correct Option: C
Explanation:

About three-fourth of the Earth's surface is covered with water, i.e., about $71\%$ of the earth's surface has water in it.  

Water vapour present in the air around us as:

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. the solid form

  2. the gaseous form

  3. liquid form

  4. none of the above

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Correct Option: B
Explanation:

Water can be found in liquid form in oceans, rivers, lakes and rain; in solid form in ice and snow; and as a gas (water vapour) in the atmosphere.

Distilled water is a form of natural water.

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. True

  2. False

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Correct Option: B
Explanation:

Distilled water is not a form of natural water. It is one of the form of purified water.

The water is collected from:

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. lakes

  2. rivers, ponds

  3. wells

  4. all of the above

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Correct Option: D
Explanation:

The water is collected from all of the above natural sources i.e lakes, rivers, ponds, and wells.

The approx. percentage of water in human body is:

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. 80 %

  2. 65 %

  3. 70 %

  4. 40 %

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Correct Option: C
Explanation:

The approx. percentage of water human body is $70\%$. The average adult human body is $50-65\%$ water, averaging around $57-60\%$. The percentage of water in infants is much higher, typically around $75-78\%$ water, dropping to $65\%$ by one year of age. Body composition varies according to gender and fitness level because fatty tissue contains less water than lean tissue. 

Water covers over :

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. 70% of the earth's surface

  2. 60% of the earth's surface

  3. 80% of the earth's surface

  4. 90% of the earth's surface

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Correct Option: A
Explanation:

Water covers over 70% of the earth's surface.


Hence the correct option is A.

Water occurs in _____ state.

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. free

  2. combined

  3. Both A and B

  4. None of the above

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Correct Option: C
Explanation:

Water occurs in both free and combined state. In free state in the form of lakes, rivers and in the combined state in the form of body fluids.

Human body contains approximately_________of water.

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. 50%

  2. 60%

  3. 70%

  4. 80%

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Correct Option: C
Explanation:

Human body contains approximately 70% of water.

The occurrence of water is maximum(in percentage terms) in:

chemistry air and atmosphere natural cycles and resources constituents of air component of air - nitrogen

  1. lakes

  2. oceans

  3. rivers

  4. ground

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Correct Option: B
Explanation:

Water occurs in oceans in maximum amount.