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Consider the following statements:
Assertion (A): Warmer air will always have more moisture than cooler air.
Reason (R): The capacity of air to hold moisture in the form of water vapour is related to air temperature.
In the context of the above, which of these is correct?
  • a)
    A is correct, and R is an appropriate explanation of A.
  • b)
    A is correct, but R is not an appropriate explanation of A.
  • c)
    A is correct, but R is incorrect.
  • d)
    A is incorrect, but R is correct.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements: Assertion (A): Warmer air will alw...
  • The maximum capacity of air to hold water vapour depends on the temperature of the air. Warmer air is capable of holding more water vapour than cooler air is.
  • This, however, does not mean that warmer air actually has more water vapour in it than cooler air. It just means that warmer air has a greater maximum capacity to hold water vapour than docs cooler air.
  • There is an upper limit to the amount of water vapour that can be present in a given mass of air.
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Community Answer
Consider the following statements: Assertion (A): Warmer air will alw...
Assertion (A): Warmer air will always have more moisture than cooler air.
Reason (R): The capacity of air to hold moisture in the form of water vapour is related to air temperature.

The correct answer is option 'D', which means Assertion (A) is incorrect but Reason (R) is correct. Let's understand why.

Explanation:

Understanding Moisture in Air:
- Moisture in the air is present in the form of water vapor.
- Warmer air has the potential to hold more moisture compared to cooler air.
- The capacity of air to hold moisture depends on temperature, which means warmer air can hold more water vapor than cooler air.

Why Assertion (A) is Incorrect:
While it is generally true that warmer air can hold more moisture than cooler air, it is not an absolute rule. There are certain situations where cooler air can have more moisture than warmer air. This can occur in specific atmospheric conditions, such as:

1. Advection:
- Advection refers to the horizontal movement of air.
- If warm, moist air moves over a cooler surface, it can cool down and reach its saturation point, leading to the formation of clouds and precipitation.
- In this case, the cooler air holds more moisture compared to the warmer air.

2. Frontal Systems:
- Frontal systems occur when two air masses with different temperatures converge.
- When a warm air mass and a cold air mass meet, the warm air is forced to rise over the colder air.
- As the warm air rises, it cools and reaches its dew point, resulting in condensation and cloud formation.
- In this scenario, the cooler air holds more moisture compared to the warmer air.

Why Reason (R) is Correct:
The capacity of air to hold moisture in the form of water vapor is indeed related to air temperature. The relationship between air temperature and moisture content can be explained by the concept of relative humidity:

1. Relative Humidity:
- Relative humidity is a measure of the amount of moisture present in the air compared to the maximum amount of moisture the air can hold at a given temperature.
- Warm air has a higher capacity to hold moisture compared to cooler air.
- As warm air cools, its capacity to hold moisture decreases.
- When the air reaches its dew point temperature, it becomes saturated, and any further cooling leads to condensation.
- Therefore, the capacity of air to hold moisture is directly related to air temperature.

To summarize, while warmer air generally has the potential to hold more moisture than cooler air, there are specific atmospheric conditions where cooler air can hold more moisture. The capacity of air to hold moisture is indeed related to air temperature, explaining the correct reason. However, the assertion that warmer air will always have more moisture than cooler air is incorrect.
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Consider the following statements: Assertion (A): Warmer air will always have more moisture than cooler air.Reason (R): The capacity of air to hold moisture in the form of water vapour is related to air temperature.In the context of the above, which of these is correct? a) A is correct, and R is an appropriate explanation of A.b) A is correct, but R is not an appropriate explanation of A.c) A is correct, but R is incorrect.d) A is incorrect, but R is correct.Correct answer is option 'D'. Can you explain this answer?
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