Advertisement Remove all ads

Viraf J. Dalal solutions for Class 6 New Simplified Middle School Chemistry chapter 4 - Water [Latest edition]

Advertisement Remove all ads

Chapters

Class 6 New Simplified Middle School Chemistry - Shaalaa.com

Chapter 4: Water

ExerciseObjective Type Questions
Exercise

Viraf J. Dalal solutions for Class 6 New Simplified Middle School Chemistry Chapter 4 Water Exercise

Exercise | Q 1.1

State the sources of water :
on the earth’s surface

Exercise | Q 1.2

State the sources of water :
below the earth’s surface

Exercise | Q 2.1

Give the importance of water in life processes

Exercise | Q 2.2

Give the importance of water in household purpose

Exercise | Q 2.3

Give the importance of water in Fire fighting

Exercise | Q 2.4

Give the importance of water in Transportation.

Exercise | Q 3.1

Explain how water plays an important role in the Industry.

Exercise | Q 3.2

Explain how water plays an important role in Agriculture.

Exercise | Q 4

Give the occurrence of water in the three different states i.e. solid, liquid, and gaseous.

Exercise | Q 5

Draw a labelled diagram to show the change of state of water from solid-state to liquid state to the gaseous state starting from ice.

Exercise | Q 6

Explain the term water cycle. State the main points to show how water moves from the earth’s surface to the atmosphere and back to the earth’s surface as rain

Exercise | Q 7

Give a reason why water is considered a universal solvent.

Exercise | Q 8.1

Define the term – solute

Exercise | Q 8.2

Define the term – solvent

Exercise | Q 8.3

Define the term:
Solution with reference to the addition of sodium chloride to water

Exercise | Q 9

Draw a neat labelled diagram of the addition of copper sulphate to water. Label solute, solvent, and solution in the same.

Exercise | Q 10

From the following substances given below state which will form a solution in the same.
(a) sodium carbonate
(b) calcium carbonate
(c) charcoal powder
(d) sodium sulphate
(e) table salt
(f) powdered particles of lead from a lead pencil
(g) iron powder
(h) copper filings
(i) sand particles
(j) honey

Exercise | Q 11.1

Name two gases which are soluble in water

Exercise | Q 11.2

Name two gases which are insoluble in water.

Exercise | Q 12

If ‘X’ g. of potassium nitrate is added to 100 g. of water at 60°C and the salt dissolves completely then :

(a) is ‘X’ g. the solubility of potassium nitrate at 60°C.
(b) is the solution formed – saturated or unsaturated
(c) if on addition ‘X’ + ‘Y’ g. of potassium nitrate to the same amount of water at the same temperature and the solute now just remains behind after stirring then –
(d) is the solution now – saturated or unsaturated
(e) is ‘X’ + ‘Y’ g. the solubility of potassium nitrate.

Exercise | Q 13.1

State whether the following statement is true or false. If false write the correct statement.
Solubility of most solids – decreases with increase in temperature

  • True

  • False.

Exercise | Q 13.2

State whether the following statement is true or false. If false write the correct statement.
Distilled water is potable water.

  • True

  • False

Exercise | Q 13.3

State whether the following statement is true or false. If false write the correct statement.
The process to remove germs in water is also called sterilization

  • True.

  • False.

Exercise | Q 14

Differentiate between chemical pollution and thermal pollution.

Exercise | Q 15

State some important steps to avoid pollution of water.

Exercise | Q 16

State what is meant by the term ‘conservation of water’.
State a few water-saving methods, which may be used in the home to conserve water.

Exercise | Q 17.1

Give a reason why :
Conservation of water is essential in spite of the fact that three fourth of the earth’s surface is covered by water.

Exercise | Q 17.2

Give a reason why :
Polluted water causes disease.

Exercise | Q 17.3

Give a reason why :
Drip irrigation helps in the conservation of water.

Advertisement Remove all ads
Objective Type Questions

Viraf J. Dalal solutions for Class 6 New Simplified Middle School Chemistry Chapter 4 Water Objective Type Questions

Objective Type Questions | Q 1.1

Complete the statement by filling in the blanks with the correct words.

________ is the purest form of water. It may dissolve gases like ________forming weak acids.

(sea water/ lake water/rain water ; chlorine/ammonia/carbon dioxide)

Objective Type Questions | Q 1.2

Complete the statement by filling in the blanks with the correct words.

Water generates ______in hydroelectric power stations and ________in boilers for industrial applications.

(carbon dioxide/steam/heat/electricity)

Objective Type Questions | Q 1.3

Complete the statement by filling in the blanks with the correct words.

Water is added to the atmosphere by _____________and _____________.

(burning of fossil fuels/condensation of vapour/ respiration by living organisms/photosynthesis)

Objective Type Questions | Q 1.4

Complete the statement by filling in the blanks with the correct words.

If potassium nitrate is added to water in a beaker to give a homogeneous mixture, then potassium nitrate is referred to as the __________, water as the __________, and the homogeneous mixture as the _______.

(solution/ solute/solvent/saturated solution)

Objective Type Questions | Q 1.5

Complete the statement by filling in the blank with the correct words.

Water fit for human consumption and drinking purposes is called ____________.

  • distilled water

  • potable water

  • rain harvested water

Objective Type Questions | Q 2.01

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

Sea water contains salts of calcium and magnesium.

  • True

  • False

Objective Type Questions | Q 2.02

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

Water finds application as a means of transporting goods.

  • True

  • False

Objective Type Questions | Q 2.03

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

On boiling water exists in the liquid state.

  • True

  • False

Objective Type Questions | Q 2.04

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

Respiration uses up water from the atmosphere.

  • True

  • False

Objective Type Questions | Q 2.05

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

Well water exists below the impervious rocky layers of earth.

  • True

  • False

Objective Type Questions | Q 2.06

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

Sodium carbonate and sodium sulphate do not form an aqueous solution.

  • True

  • False

Objective Type Questions | Q 2.07

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

If ‘X’ g. of solute is added to 100 g. of water at t°C and the solution formed is a saturated solution, then ‘X’ g. is the solubility of the solute.

  • True

  • False

Objective Type Questions | Q 2.08

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

Purification of water is carried out to remove – dissolved gases e.g. carbon dioxide and dissolved minerals like magnesium salts.

  • True

  • False

Objective Type Questions | Q 2.09

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

Water from rivers and lakes is – potable water.

  • True

  • False

Objective Type Questions | Q 2.1

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

Chemical pollutants include a metallic salt solution of mercury and lead.

  • True

  • False

Objective Type Questions | Q 3

Match the statements in List I, 1-10 with their correct answer in List II, A to J.

List I List II
1. Sodium carbonate and water A: Seawater
2. Chemical used in sedimentation during purification of water B: The preferred place for an organism
3. vapourisation C: Liquid state
4. Kerosene and water D: Aqueous solution
5. A solution which can dissolve more of solute at a given temperature E: Dissolved gases and minerals
6. Water as a habitat for marine life F: Unsaturated solution
7. A water-borne disease G: Immiscible mixture
8. Existence of water between 0°C and 100°C H: Liquid to a gaseous state
9. Taste in water is due to I: Dysentery
10. The most impure form of water J: Alum
Objective Type Questions | Q 4.01

Explain the meaning of the following term:

Rainwater harvesting

Objective Type Questions | Q 4.02

Explain the meaning of the following term:

Drip irrigation in agriculture

Objective Type Questions | Q 4.03

Explain the meaning of the following term:

Saturated solution

Objective Type Questions | Q 4.04

Explain the meaning of the following term:

Conservation of water

Objective Type Questions | Q 4.05

Explain the meaning of the following term:

The gaseous state of water in the air

Objective Type Questions | Q 5.1

Name the following

A chemical used during chlorination of water.

Objective Type Questions | Q 5.2

Name the following

An agricultural pollutant in water

Objective Type Questions | Q 5.3

Name the following

A solid, ‘natural form of water.

Objective Type Questions | Q 5.4

Name the following

The natural process by which circulation of water takes place from the earth’s surface to the atmosphere and back to the earth’s surface.

Objective Type Questions | Q 5.5

Name the following

The liquid or medium of dissolution which allows the solute to dissolve in it.

Advertisement Remove all ads

Chapter 4: Water

ExerciseObjective Type Questions
Class 6 New Simplified Middle School Chemistry - Shaalaa.com

Viraf J. Dalal solutions for Class 6 New Simplified Middle School Chemistry chapter 4 - Water

Viraf J. Dalal solutions for Class 6 New Simplified Middle School Chemistry chapter 4 (Water) 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 New Simplified Middle School 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. Viraf J. Dalal 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 New Simplified Middle School Chemistry chapter 4 Water are Concept for Capacity to Dissolve Salts, Importance of Water for Sustenance of Life on Earth, Prevention of Water Pollution, Water Pollution, Components of Solutions, Sources of Water, Importance of Water, Water Management (Conservation of Water).

Using Viraf J. Dalal Class 6 solutions Water 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 Viraf J. Dalal Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 6 prefer Viraf J. Dalal Textbook Solutions to score more in exam.

Get the free view of chapter 4 Water Class 6 extra questions for Class 6 New Simplified Middle School Chemistry and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×