CBSE Class 6 Science Chapter 8: A Journey Through States of Water — Assertion & Reason
CBSE Class 6 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 8: A Journey Through States of Water from the NCERT Class 6 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion & Reason Questions
1
Assertion (A): Ice, water, and water vapour are different forms of the same substance.
Reason (R): Water can exist in three different states: solid, liquid, and gas.
Reason (R): Water can exist in three different states: solid, liquid, and gas.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Ice, water, and water vapour are simply the solid, liquid, and gaseous states of the exact same substance.
2
Assertion (A): Water spilled on a floor disappears after some time even at room temperature.
Reason (R): The process of evaporation takes place continuously, even at room temperature.
Reason (R): The process of evaporation takes place continuously, even at room temperature.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Evaporation does not require boiling; it happens continuously at room temperature, causing wet surfaces to dry over time.
3
Assertion (A): Water drops accumulate on the inner side of a steel plate covering hot boiling water.
Reason (R): Water vapour condenses into its liquid state when it comes in contact with a cold surface.
Reason (R): Water vapour condenses into its liquid state when it comes in contact with a cold surface.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The hot steam (vapour) hits the relatively cooler steel plate and undergoes condensation, turning back into liquid water droplets.
4
Assertion (A): A glass tumbler containing ice-cold water shows water droplets on its outer surface.
Reason (R): Water from inside the tumbler seeps through the glass walls and accumulates outside.
Reason (R): Water from inside the tumbler seeps through the glass walls and accumulates outside.
Answer: (c)
A is true, but R is false. The droplets do not seep from inside. They appear because water vapour present in the surrounding air condenses when it touches the cold outer surface of the glass.
5
Assertion (A): Water is a liquid that has a fixed, unchanging shape.
Reason (R): Liquids take up the shape of the container in which they are kept.
Reason (R): Liquids take up the shape of the container in which they are kept.
Answer: (d)
A is false, but R is true. Water does not have a fixed shape; it is a liquid that flows and takes the shape of whatever container holds it.
6
Assertion (A): Ice does not flow or spread like water.
Reason (R): Ice is the solid state of water and it retains its shape irrespective of the container.
Reason (R): Ice is the solid state of water and it retains its shape irrespective of the container.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because ice is a solid, its particles are held firmly together, meaning it keeps a fixed shape and cannot flow or spread.
7
Assertion (A): The smell of food being cooked in the kitchen reaches us even in another room.
Reason (R): Gases, like the vapours carrying the food's smell, have the property of spreading out in the entire available space.
Reason (R): Gases, like the vapours carrying the food's smell, have the property of spreading out in the entire available space.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Gaseous substances do not have a fixed shape and continuously spread outward into all available space, carrying scents with them.
8
Assertion (A): Converting liquid water into solid ice is called melting.
Reason (R): The process of conversion of a solid into a liquid state is called melting.
Reason (R): The process of conversion of a solid into a liquid state is called melting.
Answer: (d)
A is false, but R is true. Converting water into ice is called freezing. Melting is specifically the conversion of a solid (like ice) into a liquid.
9
Assertion (A): If we want to change ice into water, we have to supply heat to it.
Reason (R): The process of melting requires a colder environment.
Reason (R): The process of melting requires a colder environment.
Answer: (c)
A is true, but R is false. Melting requires heat (a warmer environment) to change a solid into a liquid, not a colder one.
10
Assertion (A): Water evaporates much faster from a wide plate than from a small bottle cap.
Reason (R): An increase in the exposed surface area increases the rate of evaporation.
Reason (R): An increase in the exposed surface area increases the rate of evaporation.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. A wider plate exposes more water molecules to the air, allowing them to escape as vapour much more quickly.
11
Assertion (A): Clothes dry faster on a hot sunny day compared to a cloudy day.
Reason (R): The heat from the sun provides energy that speeds up the evaporation of water.
Reason (R): The heat from the sun provides energy that speeds up the evaporation of water.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Higher temperatures increase the rate at which water turns into vapour, drying clothes faster.
12
Assertion (A): Clothes dry very quickly on a rainy day.
Reason (R): The amount of water vapour in the air is high on a rainy day, which makes the air more humid.
Reason (R): The amount of water vapour in the air is high on a rainy day, which makes the air more humid.
Answer: (d)
A is false, but R is true. Clothes dry very slowly on a rainy day precisely because the air is already highly humid (full of water vapour), slowing down evaporation.
13
Assertion (A): Sitting under a moving fan makes us feel cooler when we are sweating.
Reason (R): The wind from the fan increases the rate of evaporation of sweat, which causes a cooling effect.
Reason (R): The wind from the fan increases the rate of evaporation of sweat, which causes a cooling effect.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Air movement speeds up evaporation, and because evaporation absorbs heat from our body, it leaves us feeling cooler.
14
Assertion (A): Water kept in an earthen pot (matka) becomes cool during summer.
Reason (R): Water seeps through the porous surface of the earthen pot and evaporates, imparting a cooling effect.
Reason (R): Water seeps through the porous surface of the earthen pot and evaporates, imparting a cooling effect.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The continuous evaporation of the seeped water on the outside of the pot pulls heat away from the water stored inside.
15
Assertion (A): Air containing water vapour tends to go up in the atmosphere.
Reason (R): Water vapour is lighter than air, causing it to rise.
Reason (R): Water vapour is lighter than air, causing it to rise.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Just like a balloon filled with a lighter gas floats upward, water vapour rises because it is less dense than the surrounding air.
16
Assertion (A): Dust particles play a significant role in the formation of clouds.
Reason (R): High in the atmosphere, water vapour condenses around tiny dust particles to form small water droplets.
Reason (R): High in the atmosphere, water vapour condenses around tiny dust particles to form small water droplets.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Invisible dust particles act as nuclei, providing a surface for water vapour to condense upon and form the visible droplets that make up clouds.
17
Assertion (A): All the water present in the oceans is directly fit for drinking by humans.
Reason (R): The circulation of water between the Earth's surface and atmosphere is known as the water cycle.
Reason (R): The circulation of water between the Earth's surface and atmosphere is known as the water cycle.
Answer: (d)
A is false, but R is true. Ocean water is extremely salty and not fit for direct use. While the water cycle does exist, it is what eventually provides us with fresh, usable water via rain.
18
Assertion (A): Water vapour is a highly visible gas that we often see rising from hot tea.
Reason (R): Water vapour is an invisible gas, but the tiny droplets of condensed water in steam make it appear visible.
Reason (R): Water vapour is an invisible gas, but the tiny droplets of condensed water in steam make it appear visible.
Answer: (d)
A is false, but R is true. True water vapour is completely invisible. The "steam" we see rising from hot drinks is actually vapour that has rapidly condensed into tiny visible water droplets in the cooler air.
19
Assertion (A): Rubbing hand sanitiser on our hands produces a cooling sensation.
Reason (R): The sanitiser evaporates quickly, taking heat away from the hands.
Reason (R): The sanitiser evaporates quickly, taking heat away from the hands.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Just like sweat, the rapid evaporation of sanitiser absorbs heat energy from the skin, leaving a feeling of coldness.
20
Assertion (A): Clouds are formed by the process of evaporation alone.
Reason (R): The water cycle involves continuous evaporation, condensation, and precipitation.
Reason (R): The water cycle involves continuous evaporation, condensation, and precipitation.
Answer: (d)
A is false, but R is true. While evaporation gets the water into the air, clouds specifically form due to condensation—when that vapour cools and turns back into liquid droplets.
❓ Frequently Asked Questions
What is covered in CBSE Class 6 Science Chapter 8 A Journey Through States of Water?
This chapter covers all key topics from A Journey Through States of Water as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 6 board exam preparation covering the complete syllabus.
Are these CBSE Class 6 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 6 Science?
All chapters of CBSE Class 6 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
Can I study A Journey Through States of Water online for free?
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