With reference to the drying of wet roads after rain, consider the following: 1. The water disappears due to evaporation. 2. Evaporation occurs only in the presence of direct sunlight. 3. The water vapour formed settles immediately as dust. Which of the statements given above is/are correct?

The correct option is (a) 1 only. Explanation Evaporation is a physical process within the environment where a liquid turns into a gas (vapour). It is a surface phenomenon that occurs at temperatures below the boiling point of the liquid. This process is a crucial part of the water cycle, facilitating the movement of water from the lithosphere and hydrosphere to the atmosphere. Statement-wise Analysis - Statement 1 is Correct: The drying of wet roads is primarily caused by evaporation. During this process, liquid water on the road surface absorbs heat energy from the surroundings (air, ground, or sun) and converts into water vapour, thereby disappearing from the surface. - Statement 2 is Incorrect: Evaporation does not require direct sunlight. It is a continuous process that occurs at any time of the day or night, provided the air is not saturated with moisture. While direct sunlight accelerates the process by providing more heat energy, evaporation also occurs in the shade or during the night using heat from the atmosphere or the ground. - Statement 3 is Incorrect: Water vapour is water in a gaseous state. Once formed, it rises and mixes with the surrounding air (atmosphere). It does not settle as dust. Dust consists of solid particulate matter, whereas water vapour is a gas that may eventually condense to form clouds or dew, but it does not transform into dust. Key Takeaway Evaporation is the conversion of liquid water into water vapour driven by heat energy. It is a continuous environmental process influenced by factors such as temperature, surface area, humidity, and wind speed, and does not strictly depend on the presence of direct sunlight.

NCERT Class 6 Environment & Ecology — Chapter 1: Water

mcqeasy

With reference to the drying of wet roads after rain, consider the following:

The water disappears due to evaporation.
Evaporation occurs only in the presence of direct sunlight.
The water vapour formed settles immediately as dust.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (a) 1 only.

Explanation

Evaporation is a physical process within the environment where a liquid turns into a gas (vapour). It is a surface phenomenon that occurs at temperatures below the boiling point of the liquid. This process is a crucial part of the water cycle, facilitating the movement of water from the lithosphere and hydrosphere to the atmosphere.

Statement-wise Analysis

Statement 1 is Correct: The drying of wet roads is primarily caused by evaporation. During this process, liquid water on the road surface absorbs heat energy from the surroundings (air, ground, or sun) and converts into water vapour, thereby disappearing from the surface.
Statement 2 is Incorrect: Evaporation does not require direct sunlight. It is a continuous process that occurs at any time of the day or night, provided the air is not saturated with moisture. While direct sunlight accelerates the process by providing more heat energy, evaporation also occurs in the shade or during the night using heat from the atmosphere or the ground.
Statement 3 is Incorrect: Water vapour is water in a gaseous state. Once formed, it rises and mixes with the surrounding air (atmosphere). It does not settle as dust. Dust consists of solid particulate matter, whereas water vapour is a gas that may eventually condense to form clouds or dew, but it does not transform into dust.

Key Takeaway

Evaporation is the conversion of liquid water into water vapour driven by heat energy. It is a continuous environmental process influenced by factors such as temperature, surface area, humidity, and wind speed, and does not strictly depend on the presence of direct sunlight.

Your note

More from Chapter 1: Water

With reference to the process of evaporation in the water cycle, consider the following statements: 1. Evaporation of water can take place even in the shade. 2. Water vapour formed during evaporation carries dissolved salts with it into the atmosphere. 3. Warm air can provide the necessary heat for evaporation to occur in shaded areas. Which of the statements given above is/are correct?

medium

Which process explains the drying of a wet surface even in the absence of direct sunlight?

easy

Consider the following statements regarding the loss of water by plants: 1. Plants release water into the air through the process of condensation. 2. Plants release a significant amount of water into the air. 3. Transpiration plays a role in adding water vapour to the atmosphere. Which of the statements given above is/are correct?

medium

With reference to the sources of water vapour in the atmosphere, consider the following statements: 1. Water vapour is added to the air exclusively by the evaporation of water from oceans and lakes. 2. Evaporation from water bodies is a major source of water vapour in the air. 3. Transpiration by plants does not contribute to the water vapour in the air. Which of the statements given above is/are correct?

easy

Consider the following statements regarding the rate of evaporation: 1. Evaporation is generally a slow process. 2. Evaporation occurs at the same rate in sunlight and in the shade. 3. Heating water on a burner increases the rate of evaporation. Which of the statements given above are correct?

easy

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The correct option is (a) 1 only.

Explanation

Statement-wise Analysis

Statement 1 is Correct: The drying of wet roads is primarily caused by evaporation. During this process, liquid water on the road surface absorbs heat energy from the surroundings (air, ground, or sun) and converts into water vapour, thereby disappearing from the surface.
Statement 2 is Incorrect: Evaporation does not require direct sunlight. It is a continuous process that occurs at any time of the day or night, provided the air is not saturated with moisture. While direct sunlight accelerates the process by providing more heat energy, evaporation also occurs in the shade or during the night using heat from the atmosphere or the ground.
Statement 3 is Incorrect: Water vapour is water in a gaseous state. Once formed, it rises and mixes with the surrounding air (atmosphere). It does not settle as dust. Dust consists of solid particulate matter, whereas water vapour is a gas that may eventually condense to form clouds or dew, but it does not transform into dust.