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Selina solutions for Class 6 Selina Concise Chemistry chapter 6 - Air and Atmosphere [Latest edition]

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Class 6 Selina Concise Chemistry - Shaalaa.com

Chapter 6: Air and Atmosphere

Exercise 1OthersExercise 2Exercise 3Objective Type QuestionsMultiple Choice QuestionsAdditional Questions For Practice
Exercise 1 [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Exercise 1 [Page undefined]

Exercise 1 | Q 1

What is atmosphere?

Exercise 1 | Q 2

Why can’t we see air?

Exercise 1 | Q 3

What is wind?

Exercise 1 | Q 4.1

What would have happened if there would have been no atmosphere around the earth?

Exercise 1 | Q 4.2

When water is heated, we see bubbles rising up. Why?

Exercise 1 | Q 5

Why is air called a mixture? Give five facts in support of your answer.

Exercise 1 | Q 6.1

What are the main components of air?

Exercise 1 | Q 6.2

Write down the composition of three main gases present in air by volume.

Exercise 1 | Q 7.1

What do you observe when Ice cold water is filled in a glass tumbler.

Exercise 1 | Q 7.2

What do you observe when burning candle is covered with an inverted jar.

Exercise 1 | Q 7.3

What do you observe when Carbon dioxide gas is passed through lime water.

Exercise 1 | Q 7.4

What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.

Q 8.1

Write the chemical name of Lime water

Q 8.2

Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.

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Exercise 2 [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Exercise 2 [Page undefined]

Exercise 2 | Q 1

Name two important processes supported by oxygen present in air.

Exercise 2 | Q 2.1

Give two uses of the following component present in air:

oxygen

Exercise 2 | Q 2.2

Give two uses of the following component present in air:

nitrogen

Exercise 2 | Q 2.3

Give two uses of the following component present in air:

carbon dioxide

Exercise 2 | Q 2.4

Give two uses of the following component present in air:

water vapour

Exercise 2 | Q 3.1

Define the following:

Respiration

Exercise 2 | Q 3.2

Define the following:

Photosynthesis

Exercise 2 | Q 3.3

Define the following:

Combustion.

Exercise 2 | Q 4.1

What are fuels?

Exercise 2 | Q 4.2

Give two examples of modern fuels.

Exercise 2 | Q 5.1

Give reason:

Aquatic animals and plants are able to survive in the matter.

Exercise 2 | Q 5.2

Give reason:

A burning candle stops burning if covered with a glass tumbler

Exercise 2 | Q 5.3

Give reason:

Mountaineers and divers carry oxygen cylinders with them.

Exercise 2 | Q 5.4

Give reason:

When water is heated, we see bubbles rising up.

Exercise 2 | Q 6

Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?

Exercise 2 | Q 7

State two similarities and two differences between respiration and burning.

Exercise 2 | Q 8.1

Define rusting?

Exercise 2 | Q 8.2

What are the two necessary conditions for rusting of iron?

Exercise 2 | Q 8.3

Give the chemical name of rust.

Exercise 2 | Q 9.1

How is air useful to water boats?

Exercise 2 | Q 9.2

How is air useful to agriculture?

Exercise 2 | Q 9.3

How is air useful to windmills?

Exercise 2 | Q 9.4

How is air useful to scooters and cars.?

Exercise 2 | Q 10

State the full form of LPG and CNG? How are the two different in their composition?

Exercise 2 | Q 11.1

Why is nitrogen important to all living beings?

Exercise 2 | Q 11.2

What is nitrogen fixation?

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Exercise 3 [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Exercise 3 [Page undefined]

Exercise 3 | Q 1

What is air pollution?

Exercise 3 | Q 2

Mention five causes of air pollution.

Exercise 3 | Q 3.1

Name two air pollutants which affect our health.

Exercise 3 | Q 3.2

Name two air pollutants which cause acid rain.

Exercise 3 | Q 3.3

Name two air pollutants which cause global warming.

Exercise 3 | Q 4

What is meant by ozone depletion?

Exercise 3 | Q 5

State four steps to be taken to control air pollution.

Exercise 3 | Q 6

Name three greenhouse gases.

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Objective Type Questions [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Objective Type Questions [Page undefined]

Objective Type Questions | Q 1.01

Fill in the blank

The layer of air around the earth is called the ________.

Objective Type Questions | Q 1.02

Fill in the blank

Although we cannot see air, we can ___it.

Objective Type Questions | Q 1.03

Fill in the blank

Air is a ______ of gases

Objective Type Questions | Q 1.04

Fill in the blanks

Plants and animals maintain the balance of carbon ___________and _________ in the air.

Objective Type Questions | Q 1.05

Fill in the blank

Polluted air is harmful to ____.

Objective Type Questions | Q 1.06

Fill in the blank

The supporter of combustion in air is _____.

Objective Type Questions | Q 1.07

Fill in the blank

Green plants need ________________to prepare food.

Objective Type Questions | Q 1.08

Fill in the blanks

Oxygen is used in ___________the food to get _______.

Objective Type Questions | Q 1.09

Fill in the blank

Aquatic plants and animals use _________ in water.

Objective Type Questions | Q 1.1

Fill in the blank

The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.

Objective Type Questions | Q 2.1

Write ‘true’ or ‘false for the following;

Air is a compound.

  • True

  • False

Objective Type Questions | Q 2.2

Write ‘true’ or ‘false for the following;

Carbon dioxide is given out during photosynthesis

  • True

  • False

Objective Type Questions | Q 2.4

Write ‘true’ or ‘false for the following;

The composition of air was discovered by Lavoisier.

  • True

  • False

Objective Type Questions | Q 2.5

Write ‘true’ or ‘false for the following;

The major component of air is oxygen.

  • True

  • False

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Multiple Choice Questions [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Multiple Choice Questions [Page undefined]

Multiple Choice Questions | Q 1

Tick (√) the correct alternative from the choice given for the following statement.

Air consists of

  • only oxygen

  • only nitrogen

  • only carbon dioxide

  • all of these

Multiple Choice Questions | Q 2

Tick (√) the correct alternative from the choice given for the following statement.

Air pollution is due to the

  • cutting of green plants

  • gases like carbon monoxide, sulphur dioxide, etc.

  • smoke given out by factories

  • all of the above

Multiple Choice Questions | Q 3

Tick (√) the correct alternative from the choice given for the following statement.

The gases which cause acid rain are

  • sulphur dioxide and oxygen

  • nitrogen and oxygen

  • carbon dioxide and water vapour

  • nitrogen dioxide and sulphur dioxide

Multiple Choice Questions | Q 4

Tick (√) the correct alternative from the choice given for the following statement.

Rust is

  • hydrated iron oxide

  • hydrated copper sulphate

  • anhydrous iron oxide

  • none of the above

Multiple Choice Questions | Q 5

Tick (√) the correct alternative from the choice given for the following statement.

Photosynthesis is a process in which plants

  • take in oxygen and give out carbon dioxide

  • take in carbon dioxide and give out oxygen

  • take in nitrogen and give out oxygen

  • none of the above

Multiple Choice Questions | Q 6

Tick (√) the correct alternative from the choice given for the following statement.

Fuels which do not leave any residue on burning are

  • coal and wood

  • coal and LPG

  • wood and CNG

  • LPG and CNG

Multiple Choice Questions | Q 7

Tick (√) the correct alternative from the choice given for the following statement.

Respiration

  • is a slow process

  • is a natural and continuous process

  • takes place at body temperature

  • all of the above

Multiple Choice Questions | Q 9

Tick (√) the correct alternative from the choice given for the following statement.

Which of the following is not a greenhouse gas?

  • carbon dioxide

  • sulphur dioxide

  • methane

  • nitrogen

Multiple Choice Questions | Q 10

Tick (√) the correct alternative from the choice given for the following statement.

The substance which accelerates the speed of a reaction without itself undergoing any change is called

  • catalyst

  • pollutant

  • fuel

  • none of the above

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Additional Questions For Practice [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Additional Questions For Practice [Page undefined]

Additional Questions For Practice | Q 1

State what do you understand by the term ‘air’. Explain its importance to mankind.

Additional Questions For Practice | Q 2

Give a brief account of the discovery of air and the scientists involved.

Additional Questions For Practice | Q 3

What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.

Additional Questions For Practice | Q 4

Explain in brief the different layers of the atmosphere and the basic functions of the main layers.

Additional Questions For Practice | Q 5.1

Describe a simple experiment with the help of a diagram to show that Air occupies space

Additional Questions For Practice | Q 5.2

Describe a simple experiment with the help of a diagram to show that Air has mass

Additional Questions For Practice | Q 5.3

Describe a simple experiment with the help of a diagram to show that Air exerts pressure

Additional Questions For Practice | Q 5.4

Describe a simple experiment with the help of a diagram to show that Air is highly compressible

Additional Questions For Practice | Q 6

Name the components of air with their approximate percentage by volume in air. Does the percentage by volume of each component remain the same, in the atmosphere of different parts of the world? Explain with reasons.

Additional Questions For Practice | Q 7

With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.

Additional Questions For Practice | Q 8

You are given a test tube with two outlets and a bottle of lime water. Using same, how would you demonstrate experimentally the presence of carbon dioxide in air.

Additional Questions For Practice | Q 9

Give a reason why water droplets appear on the outer surface of a tumbler containing ice.

Additional Questions For Practice | Q 10

Explain the importance of nitrogen of the air for plant growth.

Additional Questions For Practice | Q 11

Give a reason why nitrogen is filled in food packets and not oxygen.

Additional Questions For Practice | Q 12

State what would happen, if the air above the earth contained mainly oxygen and no nitrogen

Additional Questions For Practice | Q 13.1

State the utility of oxygen for respiration in living organisms

Additional Questions For Practice | Q 13.2

State the utility of oxygen for respiration in plants

Additional Questions For Practice | Q 15

Explain the importance of carbon dioxide for (a) photosynthesis (b) warming the earth’s environment. State what would happen if excess carbon dioxide as a pollutant is released into the atmosphere.

Additional Questions For Practice | Q 16

State in brief how water vapour in the atmosphere determines the climatic conditions

Additional Questions For Practice | Q 17

Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.

Additional Questions For Practice | Q 18

A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.

Additional Questions For Practice | Q 19

State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.

Additional Questions For Practice | Q 20

Name three different appliances where air is utilized.

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Objective Type Questions [Page undefined]

Selina solutions for Class 6 Selina Concise Chemistry Chapter 6 Air and Atmosphere Objective Type Questions [Page undefined]

Objective Type Questions | Q 1

Match the statements in List 1 with the correct answers in List 2

List 1 List 2
1 An impurity in air A Water vapour
2 The component of air which supports combustion B Respiration
3 The inert component in the air slightly soluble in water C Rare gases
4 The component of air which minimizes the rate of evaporation D Sulphur dioxide
5 The process which involves oxidation of food substance in living organisms E Helium
6 The component of air which finds application in observation balloons F Carbon dioxide
7 The process which involves oxidation of substances, liberating heat and light energy G Combustion
8 The component of air which is heavier than air and fairly soluble in water H Nitrogen
9 The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates I Photosynthesis
10 The component of air which is lighter than air and less than 1% in air J Oxygen
Objective Type Questions | Q 2

The diagrams below represents an experiment to show the presence of a component of air.

  1. State why air is sucked from – outlet ‘B’ and not from outlet “A”
  2. State why the air is sucked ‘slowly’ from the outlet “B”
  3. State the observation seen after completion of the experiment.
  4. State the reason for the above observation seen.
  5. Name another component which if present in air as a pollutant would have given a similar observation
Objective Type Questions | Q 3.1

Complete the statement given below by filling in the blank with the correct word from the words given below

The ______ is a layer which extends up to about 10-50 km. above the earth.

  • atmosphere

  • troposphere

  • stratosphere

Objective Type Questions | Q 3.2

Complete the statement given below by filling in the blank with the correct word from the words given

___________is an example of a pollutant present in the air.

  • carbon dioxide

  • stratosphere

  • nitrogen dioxide

  • water vapour

  • hydrogen sulphide

Objective Type Questions | Q 3.3

Complete the statement given below by filling in the blank with the correct word from the words given:

The component of air used in photosynthesis is ______ and the products of photosynthesis is oxygen.

  • oxygen

  • carbon dioxide

  • nitrogen

Objective Type Questions | Q 3.4

Complete the statement given below by filling in the blank with the correct word from the words given:

The product formed which is common to both combustion and respiration is ______.

  • oxygen

  • carbon dioxide

  • nitrogen dioxide

Objective Type Questions | Q 3.5

Complete the statement given below by filling in the blank with the correct word from the words given:

The component of air which is variable in air above sea level and in air in general ______.

  • oxygen

  • nitrogen

  • water vapour

Objective Type Questions | Q 4.01

Name the following:

The product formed when phosphorus burns in oxygen.

Objective Type Questions | Q 4.02

Name the following:

The layer of atmosphere which contains the ozone layer.

Objective Type Questions | Q 4.03

Name the following:

The active component of air which supports combustion and is used up in burning

Objective Type Questions | Q 4.04

Name the following:

The main, rare (inert) gas present in air.

Objective Type Questions | Q 4.05

Name the following:

The component of air which is present more in industrial areas.

Objective Type Questions | Q 4.06

Name the following:

The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.

Objective Type Questions | Q 4.07

Name the following:

The product of respiration released in exhaled air, other than carbon dioxide.

Objective Type Questions | Q 4.08

Name the following:

An inert gas which has a low boiling point and is used for producing very low temperatures

Objective Type Questions | Q 4.09

Name the following:

A process which removes carbon dioxide from the air.

Objective Type Questions | Q 4.1

Name the following:

The component of air which does not support combustion.

Objective Type Questions | Q 5.1

State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.

The mesosphere in the atmosphere, contains most of the air, fit for respiration

  • True

  • False

Objective Type Questions | Q 5.2

State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.

The percentage of carbon dioxide in the air is between 0.2 to 0.4%.

  • True

  • False

Objective Type Questions | Q 5.3

State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.

Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.

  • True

  • False

Objective Type Questions | Q 5.4

State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.

Photosynthesis is a process by which green plants prepare their own food in the presence of sunlight and chlorophyll.

  • True

  • False

Objective Type Questions | Q 5.5

State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.

Air is a mixture and not a compound since the components of air cannot be separated by physical methods.

  • True

  • False

Objective Type Questions | Q 6.1

Give word equation for the following conversion:

Nitrogen of the air to nitric oxide

Objective Type Questions | Q 6.2

Give word equation for the following conversion:

Nitric oxide to nitrogen dioxide

Objective Type Questions | Q 6.3

Give word equation for the following conversion:

Nitrogen dioxide to nitric acid

Objective Type Questions | Q 6.4

Give word equation for the following conversion:

Nitric acid to soluble nitrates in the soil

Objective Type Questions | Q 6.5

Give word equation for the following conversion:

Carbon dioxide in the air to carbohydrates in plants.

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Chapter 6: Air and Atmosphere

Exercise 1OthersExercise 2Exercise 3Objective Type QuestionsMultiple Choice QuestionsAdditional Questions For Practice
Class 6 Selina Concise Chemistry - Shaalaa.com

Selina solutions for Class 6 Selina Concise Chemistry chapter 6 - Air and Atmosphere

Selina solutions for Class 6 Selina Concise Chemistry chapter 6 (Air and Atmosphere) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Class 6 Selina Concise Chemistry solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 6 Selina Concise Chemistry chapter 6 Air and Atmosphere are Concept of Percentage Composition of Air, Uses of the Components Present in Air, Importance of Nitrogen to Plants, Concept of Atmosphere, Concept of Air.

Using Selina Class 6 solutions Air and Atmosphere exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 6 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 6 Air and Atmosphere Class 6 extra questions for Class 6 Selina Concise Chemistry and can use Shaalaa.com to keep it handy for your exam preparation

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