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# Xam Idea Class 9 Science Chapter 2 Solutions: Is Matter Around Us Pure

Xam Idea Class 9 Science Solutions Chapter 2 – Is Matter Around Us Pure are formulated as per the CBSE and NCERT syllabus to make your exam preparations easier. Our Xam Idea Solutions include all the important concepts of the chapter like solute, solvents, dissolution, mass percentage and colloids. We have provided theory-based explanations of the concepts so that you can learn to answer questions in the CBSE exams. The concepts of suspensions, Tyndall effect, true solutions and separation of impurities have been explained with diagrams and illustrations.

Xam Idea Class 9 Science Solutions Chapter 2 – Is Matter Around Us Pure have 6 exercises and more than 50 questions for practice. These questions are based on the latest CBSE exam pattern. They are very short answer type questions, short answer type questions, long answer type questions, higher-order thinking skills and value-based questions. Once you solve these questions you will learn to deal with problems which tackle different concepts of metals, non-metals, homogeneous mixtures, heterogeneous mixtures, boiling point and density.

Instasolv’s solutions for Xam Idea Science Class 9 Chapter 2 – Is Matter around us pure have been organized to ensure that your doubts are handled carefully. You will get more time to invest in your learning process with our solutions. With the direction of our dedicated team and your rigorous hard work, nothing can stop you from scoring well in your exams. All our solutions are created in a stepwise fashion and are free to access at all times.

## Important Topics for Xam Idea Class 9 Science Solutions Chapter 2 – Is Matter Around Us Pure

Mixture

The chapter begins with an introduction to the word ‘mixture’. In this chapter, you will learn that the term mixture is used to denote a combination made of more than one kind of substance which is pure in nature.

Types of Mixtures

In this chapter, you will come across the two major kinds of mixtures which are – Heterogeneous mixtures and Homogeneous Mixtures. The mixtures with uniform compositions are known as homogeneous mixtures whereas those with a non-uniform composition are known as heterogeneous.

Colloids

Colloidal solutions are heterogeneous mixtures which are composed of two substances. They have a range of particles which lie between one nanometer to 1000 nanometer. They are translucent and their particles can easily be detected with a microscope. They also show a Tyndall effect.

Tyndall Effect

The phenomenon of scattering of a light beam on passing it through a colloid, known as the Tyndall effect, has also been explained in the chapter. It serves as one of the characteristics in determining whether the solutions are colloidal or true in nature.

Solutions

A homogeneous mixture consisting of two or more substances is termed as a solution. A solution consists of two major parts – the solute, the solvent.

True Solutions

A homogeneous mixture of two or more substances has been termed as a true solution. The size of true solution particles is less than one nanometer and they are always transparent. These particles can not be detected through a microscope and they do not show the Tyndall effect.

Mass-percent of a Solution

In this chapter, you will learn about the concept of mass percent of a solution. Mass percent refers to the mass in grams of the solute that is present in one hundred grams of a solution.

### Exercise Discussion of Xam Idea Class 9 Science Solutions Chapter 2 – Is Matter Around Us Pure

Very Short Answer Type Questions

• There are a total of 15 questions in this exercise.
• The first question inquires you can change a saturated solution to an unsaturated solution without the addition of any solvent in it.
• The second question requires you to analyze whether the crystals obtained from sugar cane and beetroot on mixing together form a pure mixture or not.
• The third question discusses the characteristic factor for a solution to be diluted, concentrated or saturated.

• The fourth question is to identify the solute and solvent from ‘a tincture of iodine’.
• The fifth question asks what is meant by mass percent of a solution.
• The sixth question requires you to give the two components of a colloidal solution and the next question discusses the differences between a colloidal solution and a true solution.
• Question eight is an observation based question which deals with the concepts of temperature and fractional distillation.
• In the ninth question, you are required to explain what is meant by crystallization and in the next one, you need to describe why crystallization techniques are considered to be better than simple evaporation.
• The eleventh question discusses why water is called a universal solvent.
• The twelfth question presents numerous changes and you need to detect which of them are physical in nature.
• In the thirteenth question, you are required to name the elements which exist in the liquid state in room temperature.
• The last question again puts forth numerous substances and you are required to detect the elements from them.

Short Answer Type Questions

• This exercise has fourteen questions in total.
• The first question requires you to reflect why seawater is classified as a homogeneous as well as a heterogeneous mixture.
• The second question asks why is it not possible to differentiate between particles of solute from the solvent, in case of a solution.
• Then there are questions which revolve around colloids, colloidal solutions, true solutions, and suspension.
• The sixth question wants you to differentiate between smoke and fog
• In the seventh question, you are required to explain what is meant by distillation along with an application of it.
• The eighth question requires you to present a technique which can help in getting back acetone form the solution based on the information that has been shared in the question.
• The ninth question requires you to define chromatography and give one of its applications
• The tenth question presents many examples of substances out of which you are required to detect and label the solvent, the colloid, suspension and solute.
• The eleventh question also requires you to classify physical and chemical properties from the list of statements given in the question.
• Twelfth question discusses the differences between elements and compounds.
• Question thirteen has nine examples of different substances and you need to select which of them are not compounds.
• The last question wants you to answer whether or not water is a compound and justify your answer with a suitable reason.

Short Answer Type Questions

• This exercise has 10 questions in total.
• The first question requires you to detect the dispersed phase and the dispersing medium from the set of information given along with the question.
• The second question requires you to describe any three properties of colloids.
• The third question requires you to give an experiment in order to demonstrate the separation of water and kerosene oil.
• The fourth question is an observation based problem and requires you to answer the sub-questions regarding aqueous sugar, heat, saturated solutions and room temperature.
• the fifth question presents four different mixtures and you are required to name the methods which can be used in order to separate them.
• The seventh question deals with the heating of calcium carbonate into calcium oxide and carbon dioxide. There are two sub-questions based on this activity which you are required to observe and answer.
• Question eight consists of six sub-parts which put forth conditions regarding lustre, malleability and conductance and you need to give suitable examples for each of them
• Question nine again has numerous substances and you need to classify each of them as metals, nonmetals and metalloids.
• The last question requires you to classify the given set of substances as elements, compounds and mixtures.

Long Answer Type Questions

• This exercise has a total of 11 questions.
• The first question requires you to differentiate between colloids and true solutions.
• The second question discusses the differences between physical and chemical changes
• The third question also belongs to the same category and requires you to differentiate between metals and nonmetals. The sixth question distinguishes between compounds and mixtures.
• Then there are questions regarding distillation, Tyndall effect, separation of pigments which have been showcased through experiments and require you to observe them and present answers.

HOTS (Higher Order Thinking Skills)

• There are seven questions in this exercise.
• The first question has three parts which revolve around alloys, solution and heterogeneous nature.
• The second question is a numerical based problem which utilizes the concept of volume per cent.
• The third question requires you to explain why filter paper can not be used in order to separate colloids.
• The fourth question presents a situation regarding a mixture and then presents five sub-questions with respect to the Tyndall effect, filtration, clear solutions and particle settlements.
• The fifth question discusses if alcohol could be separated after it is dissolved in water.
• The sixth question requires you to reflect on the reason why cold water is run through the lower to the upper side in a condenser
• The last question is an observation based problem where you are presented with a scenario regarding two water bottles and you are required to tell which of them will not freeze at 0 degrees Celsius.

### Why Use Xam Idea Class 9 Science Solutions Chapter 2 – Is Matter Around Us Pure

• We have ensured that all the Xam Idea Class 9 Science Solutions for Chapter 2 – Is Matter Around Us Pure are explained in step by step detailed manner and an easy language.
• We have given the emphasis on ensuring that all our answers are provided according to the guidelines of CBSE curriculum and follow the NCERT textbooks.
• We have ensured that each and every question from the chapter has been entertained and resolved with care in our Xam Idea Class 9 Science Solutions.
• Our Xam Idea solutions are formulated by experienced and accomplished individuals, whose research and devoted work has made our solutions reliable and trustworthy.
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