Class 6 chemistry important questions with answers are provided here for Chapter 14 –Water. These important questions are based on the CBSE board curriculum and correspond to the most recent Class 6 chemistry syllabus. By practising these Class 6 important questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 6 annual examinations.
Download Class 6 Chemistry Chapter 14 – Water Important Questions with Answers PDF by clicking on the button below.
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Class 6 Chapter 14 – Water Important Questions with Answers
Fill in the Blanks
i.) Ice, water, and ____ are the three states of the same material.
ii.) The falling of water is called ____.
iii.) Rainwater can be used to recharge ____.
iv.) ____ is not a source of potable water.
v.) The water in the seas and oceans has many dissolved ____ in it.
Answer.
i.) Ice, water, and water vapour are the three states of the same material.
ii.) The falling of water is called precipitation.
iii.) Rainwater can be used to recharge groundwater.
iv.) Sea/oceans are not a source of potable water.
v.) The water in the seas and oceans has many dissolved salts in it.
State True or False
i.) Well water is an example of surface water.
ii.) In the upper layers of the atmosphere, water vapour condenses to form tiny droplets of water.
iii.) With an increase in population, water demand increases.
iv.) Living beings can survive without water.
v.) The process of absorption of water from leaves is called respiration.
Answer.
i.) False
ii.) True
iii.) True
iv.) False
v.) False
Match the Following
| Column A | Column B |
| a.) Oceans | i.) Are covered with ice |
| b.) Water conservation | ii.) Source of saline water. |
| c.) Poles | iii.) Rain and snow |
| d.) Rivers and lakes | iv.) Rooftop harvesting |
| e.) Precipitation | v.) Sources of groundwater |
Answer.
| Column A | Column B |
| a.) Oceans | ii.) Source of saline water. |
| b.) Water conservation | iv.) Rooftop harvesting |
| c.) Poles | i.) Are covered with ice |
| d.) Rivers and lakes | v.) Sources of groundwater |
| e.) Precipitation | iii.) Rain and snow |
Very Short Answer Questions
Q1. Define transpiration.
Answer. Transpiration is the process by which plants absorb water via their roots and then expel it via pores in their leaves.
Q2. Define evaporation.
Answer. Evaporation is the conversion of liquid water to gaseous water (water vapour). Evaporation moves water from the Earth’s surface to the atmosphere.
Q3. What is precipitation?
Answer. Any liquid or frozen water that forms in the atmosphere and falls back to the Earth’s surface is referred to as precipitation. It is one of three major steps in the water cycle.
Q4. Name two major processes that continuously convert water on Earth into water vapour.
Answer. Evaporation and transpiration.
Q5. Name some water sources.
Answer. Hand pumps, tube wells, rivers, ponds, lakes, and oceans are some water resources.
Q6. What is potable water?
Answer. Potable water is water that is suitable or fit for drinking.
Q7. What is the main source of groundwater?
Answer. Rainwater.
Q8. What is a glacier?
Answer. A glacier is a hard body of dense ice that moves under its own weight. The melting glaciers provide water for the rivers.
Q9. What is the water cycle?
Answer. The water cycle, also known as the hydrologic cycle or the hydrological cycle, is the continuous movement of water on, above, and beneath the Earth’s surface.
Q10. Why is water referred to as a universal solvent?
Answer. Water is known as a universal solvent because it can dissolve a large range of substances.
Short Answer Questions
Q1. What causes Floods?
Answer. Floods occur due to an abrupt increase in water level in a specific location. It occurs as a result of significant erosion and heavy rainfall or as a result of an earthquake.
Q2. What are the different ways by which water vapour is released into the atmosphere?
Answer. Due to the heat in the atmosphere, water evaporates in oceans, lakes, and ponds. Factories and thermal power plants emit a lot of steam into the atmosphere. Plants emit water vapour through transpiration. Water vapour is excreted by animals through respiration and sweating. All of this vapour condenses in the atmosphere.
Q3. Why is water important to us?
Answer. Water is important to us in the following ways:
- Water regulates body temperature through respiration and evaporation.
- All metabolic reactions in the body occur in an aqueous medium.
- It transports minerals and food materials in the bodies of plants and animals.
Q4. How can we save water?
Answer. We can save water in the following ways:
- Avoid wasting water by repairing all leaking water taps.
- Never use drinking water in the garden or for cleaning.
- Do not dispose of waste in ponds or rivers to avoid pollution.
Q5. How does concrete flooring affect groundwater?
Answer. Concrete-covered areas reduce groundwater availability because concrete reduces rainwater seepage into the ground, reducing groundwater availability.
Q6. What happens to the water that rain and snow bring to various parts of the world?
Answer. Some of the water that rain and snow brings flows as rivers and streams. The rainwater also fills lakes and ponds, and a part of it is absorbed by the ground and disappears in the soil. Some of this water is returned to the atmosphere via evaporation and transpiration.
Q7. What is dew, and how does it form?
Answer. Water evaporates from the warm ground into the atmosphere on a clear day. When night falls, the ground radiates the warmth of the day into the sky. The ground cools significantly, causing water vapour to condense. Dew is a condensed vapour.
Q8. Why is ocean water unfit for human consumption?
Answer. Sea and ocean water contains a high concentration of various salts. Because of these salts, ocean water is salty and cannot be used for drinking, washing, or irrigation.
Q9. Draw a labelled diagram of the water cycle.
Answer. 
Q10. What is drought? When does a drought occur?
Answer. Drought is a prolonged period of no rain, resulting in a severe water shortage in the region.
Due to a lack of rain, the water level in lakes and ponds drops, and some may even dry up completely. In the absence of rain, no water seeps into the ground, causing the level of groundwater in wells, etc., to plummet. As a result, groundwater becomes scarce. Due to this, a prolonged period of no or very low rains causes an overall water shortage, leading to drought.
Long Answer Questions
Q1. Explain the role of the oceans in the water cycle.
Answer. The oceans contain the majority of the world’s freshwater supply. Oceans have the most exposed surface area to the sun for evaporation. As a result, the oceans provide the vast majority of the water that evaporates into the atmosphere. Clouds form when water vapour condenses. Clouds collect and condense water droplets, which fall to Earth as rain, snow, or hail. Oceans are thus required for sufficient water vapour formation, which aids in the water cycle.
Q2. What is rainwater harvesting? Describe two methods for collecting rainwater.
Answer. Rainwater harvesting is the process of collecting and storing rainwater for later use. This allows rainwater to be used during seasons and times when water is scarce.
There are two methods for collecting rainwater:
- Rooftop rainwater can be collected and directed to a recharge pit or storage tank by collecting and diverting rainwater collected on roofs through pipes. Rainwater collected in tanks can be used right away or allowed to soak into the ground to recharge the groundwater and keep the water table stable.
- Rainwater can be diverted to drains, which are then directed to recharge pits, replenishing the groundwater table.
Q3. Write down the advantages of rain.
Answer. After hot summer days, rains provide relief by cooling the environment. Many crops are dependent on the arrival of rain during the monsoon season. Rains supply water to the rivers, dams and hydroelectric power plants. Rains fill the lakes and ponds that serve as water sources. Rains are also responsible for the underground water accumulating beneath the Earth’s surface.
Q4. Explain the formation of the cloud.
Answer. Condensation is an important factor in the formation of clouds. Water vapours that enter the atmosphere rise with it. Water vapour becomes cooler and cooler as the air rises. At high enough altitudes, the air becomes so cool that the water vapour in it condenses into tiny droplets of water. As these water droplets get closer together, they combine to form slightly larger droplets. As a result, their size increases. When the size of these droplets increases, they appear to us as clouds.
Q5. Excessive rainfall from heavy rains causes numerous problems. Do you agree?
Answer. Heavy rains cause flooded roads and streets. This causes traffic congestion and inconvenience to the public. Floods can occur as a result of heavy or excessive rain. This occurs because heavy rains cause an excessive rise in the level of water in the river. The river begins to overflow its banks and spread across a large area of land, causing floods. Floodwaters may submerge cities, villages, crop fields, and forests, causing damage to property, human life, domestic animals, and forest wildlife.
The fast-flowing flood waters carry away the animals that live in the water. These water animals frequently become stranded on land and die when the floodwaters recede. Heavy rains also kill the animal living in the soil.
Read Also:
- Uses of Water
- Water
- Water Scarcity
- Class 6 Chemistry Worksheet on Chapter 14 Water Set 1
- Class 6 Chemistry Worksheet on Chapter 14 Water Set 2
- Class 6 Chemistry Worksheet on Chapter 14 Water Set 3
- Water Management Questions
- Class 6 Chemistry Chapter 14 Water MCQs
- Chemistry Concept Questions and Answers
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