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Test: Water In The Atmosphere - 2 - CTET & State TET MCQ


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15 Questions MCQ Test NCERT Textbooks (Class 6 to Class 12) - Test: Water In The Atmosphere - 2

Test: Water In The Atmosphere - 2 for CTET & State TET 2024 is part of NCERT Textbooks (Class 6 to Class 12) preparation. The Test: Water In The Atmosphere - 2 questions and answers have been prepared according to the CTET & State TET exam syllabus.The Test: Water In The Atmosphere - 2 MCQs are made for CTET & State TET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Water In The Atmosphere - 2 below.
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Test: Water In The Atmosphere - 2 - Question 1

Arrange the following forms of precipitation in the correct order based on temperature conditions:

  1. Rainfall
  2. Snowfall
  3. Hailstones
  4. Sleet

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 1
  • Rainfall occurs when the temperature is above 0°C.
  • Snowfall occurs when the temperature is below 0°C.
  • Sleet occurs when rain falls through a freezing layer near the ground.
  • Hailstones form when raindrops pass through very cold layers, freezing into ice pellets.
Test: Water In The Atmosphere - 2 - Question 2

The amount of water vapour actually present per unit weight of air is known as

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 2

The weight of water vapor per unit weight of air is called Specific humidity. It is usually expressed as grams of vapor per kilogram of air. The rate of evaporation of water from any surface is directly proportional to the specific humidity, the difference between the surface and the adjoining air.

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Test: Water In The Atmosphere - 2 - Question 3

Assertion (A): Absolute humidity is defined as the total weight of water vapor present in the air per unit volume.

Reason (R): The relative humidity indicates the percentage of moisture in the air compared to its total capacity at a specific temperature.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 3

- The assertion is correct because absolute humidity is indeed the measure of the weight of water vapor in a given volume of air, typically expressed in grams per cubic meter.

- The reason is also correct since relative humidity is defined as the ratio of the current absolute humidity to the maximum possible humidity at that temperature, expressed as a percentage.

- The reason correctly explains the assertion as it elaborates on the concept of moisture in the air, which is integral to understanding absolute humidity.

 

Test: Water In The Atmosphere - 2 - Question 4

Which one is the form of a cloud?

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 4
  • Cirrus: These are high-altitude clouds that are thin and wispy in appearance.

  • Cumulus: These are puffy, white clouds that often have flat bottoms. They are usually associated with fair weather.

  • Stratus: These are low-lying clouds that are uniform and gray in appearance. They often bring overcast skies and light precipitation.

  • All of these: This option includes all three types of clouds mentioned above - cirrus, cumulus, and stratus. So, the correct answer is "all of these.
Test: Water In The Atmosphere - 2 - Question 5

Name the process by which liquid vapour changes into solid form

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 5

When the excess water vapour condenses directly into solid form it is known as sublimation.

Test: Water In The Atmosphere - 2 - Question 6

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 6
  • A. Nimbus clouds are black or dark gray, often dense and opaque.
  • B. Dew Point is the temperature at which air becomes fully saturated.
  • C. Sublimation is the process where water vapor changes directly into a solid.
  • D. Absolute Humidity is the actual amount of water vapor present in the atmosphere.
Test: Water In The Atmosphere - 2 - Question 7

Which of the statements given above is/are correct?

i. Fog is a cloud that forms with its base at or very near to the ground, leading to poor visibility.

ii. Mist contains less moisture than fog and is primarily formed over mountains when warm air rises and meets cold surfaces.

iii. Nimbus clouds are thin, detached clouds that are always white in color.

iv. Cumulus clouds resemble cotton wool and are typically formed at altitudes between 4,000 - 7,000 meters.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 7

The correct answer is b) i and iv.

Explanation:

  • Statement i is correct: Fog is a type of cloud that forms near or at the ground level, reducing visibility.
  • Statement ii is incorrect: Mist contains less moisture than fog, but it can form in various environments, not just over mountains when warm air rises. Mist typically forms when the air near the ground cools.
  • Statement iii is incorrect: Nimbus clouds are not thin and white; they are thick, dark clouds associated with precipitation.
  • Statement iv is correct: Cumulus clouds are fluffy and resemble cotton wool, typically forming at altitudes between 4,000 to 7,000 meters.
Test: Water In The Atmosphere - 2 - Question 8

Assertion (A): Dew forms when moisture is deposited on cooler surfaces under conditions of high relative humidity and clear skies.

Reason (R): Dew can only form when the temperature is at or below the freezing point.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 8
  • The assertion is true. Dew does indeed form when moisture condenses on cooler surfaces under conditions of high relative humidity and clear skies.
  • The reason is false. Dew can form when the temperature is above freezing, as it is not limited to only conditions at or below freezing.
  • Since the assertion is true but the reason is false. Thus, the correct option is Option C.
Test: Water In The Atmosphere - 2 - Question 9

Which of the statements given above is/are correct?

i. Water exists in the atmosphere in three forms: gaseous, liquid, and solid.

ii. Absolute humidity refers to the percentage of moisture in the atmosphere compared to its full capacity.

iii. The dew point is defined as the temperature at which air is saturated with moisture.

iv. Relative humidity is the weight of water vapor per unit volume of air.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 9

- Statement i is correct because water is indeed present in the atmosphere in three forms: gaseous (water vapor), liquid (rain, fog), and solid (snow, ice).

- Statement ii is incorrect. Absolute humidity is the actual amount of water vapor present in the air, measured in grams per cubic meter, not a percentage of moisture capacity.

- Statement iii is correct. The dew point is the temperature at which air reaches saturation and can hold no more moisture.

- Statement iv is incorrect. Relative humidity is the percentage of moisture in the air compared to its maximum capacity at a given temperature, not the weight of water vapor per unit volume.

Thus, the correct statements are i and iii, leading to the final answer being A: i and iii.

Test: Water In The Atmosphere - 2 - Question 10

Which of the statements given above is/are correct?

i. Evaporation is primarily caused by the loss of heat from water.

ii. Condensation occurs when the air temperature is lowered to the dew point.

iii. Sublimation refers to the direct transition of water vapor into liquid form.

iv. Hygroscopic condensation nuclei assist in the condensation process by absorbing water.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 10
  • Statement i: Incorrect. Evaporation is caused by the absorption of heat, not the loss of heat.
  • Statement ii: Correct. Condensation occurs when moist air is cooled to its dew point, leading to the transformation of water vapor into liquid.
  • Statement iii: Incorrect. Sublimation is the process where a solid transitions directly to a gas, not the transformation of vapor into liquid.
  • Statement iv: Correct. Hygroscopic condensation nuclei, such as dust and salt particles, are essential for condensation as they attract water vapor.

Thus, the correct statements are ii and iv, making Option C (i, ii, and iv) the right choice.

Test: Water In The Atmosphere - 2 - Question 11

Assertion (A): The classification of clouds is primarily based on their altitude and appearance.

Reason (R): Different cloud types, such as cirrus and nimbus, indicate specific weather conditions and precipitation levels.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 11

- The assertion is correct as clouds are indeed classified based on their altitude (high, middle, low) and appearance (shape and density).

- The reason is also correct because different types of clouds do signify various weather conditions, with cirrus clouds typically indicating fair weather and nimbus clouds often associated with rain.

- Since the reason explains why the classification exists in terms of weather prediction, it serves as the correct explanation of the assertion. Therefore, Option A is the correct choice.

Test: Water In The Atmosphere - 2 - Question 12

Which type of clouds are formed at a height of (4000-7000 m)?

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 12

Cumulus clouds: Cumulus clouds are puffy, white clouds often with flat bases. They are formed at medium to high altitudes, typically between 4000-7000 meters. Cumulus clouds are associated with fair weather, but can also grow into thunderstorms.


     
Test: Water In The Atmosphere - 2 - Question 13

Assertion (A): Evaporation of water increases when the temperature of the surrounding air rises.

Reason (R): Higher temperatures enhance the capacity of air to hold moisture, leading to increased evaporation.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 13
  • Assertion (A) is correct. Evaporation occurs at a faster rate when the temperature increases, as warmer air can hold more water vapor.
  • Reason (R) is also correct. Higher temperatures indeed allow air to retain more moisture, facilitating greater evaporation.
  • The reason provided is the correct explanation of the assertion, as it directly supports why increased temperature leads to increased evaporation.
  • Therefore, both the assertion and reason are true, and the reason is the correct explanation for the assertion.
Test: Water In The Atmosphere - 2 - Question 14

Which of the given statement(s) is/are true?

Statement I: Condensation occurs when air is heated and expands.

Statement II: Condensation can lead to the formation of clouds, dew, frost, or fog.

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 14
  • Statement I is false because condensation occurs when air cools and contracts, not when it heats up and expands.
  • Statement II is true; condensation can indeed lead to the formation of clouds, dew, frost, or fog.
Test: Water In The Atmosphere - 2 - Question 15

The %age of moisture present in the atmosphere as compared to its full capacity is known as

Detailed Solution for Test: Water In The Atmosphere - 2 - Question 15

  • Relative Humidity: Relative humidity is the % of moisture present in the atmosphere as compared to its full capacity at a specific temperature. It is expressed as a percentage.

  • Relative humidity is calculated by dividing the actual water vapor content by the maximum possible water vapor content at a given temperature and multiplying by 100 to get a percentage.

 

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