Tag: constituents of air

Questions Related to constituents of air

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.

Water occurs in combined state in:

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

  1. cotton

  2. anhydrous salts

  3. vegetables

  4. rocks

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Correct Option: C
Explanation:

Fruits and vegetables contain large quantities of water in proportion to their weight. When these foods are eaten, the water can be absorbed by the body. These water found in Vegetables in combined state.

Which of the following water is fit for use:

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

  1. fresh water

  2. ocean water

  3. distilled water

  4. none of these

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Correct Option: A
Explanation:

Most of this water present on earth in different sources is not fit for human consumption. The water that is fit for use is freshwater.