It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services. The disease which lasts for only a short period of time is called Acute Disease. For example: Influenza (Flu), Common cold, etc. For example: TB, Cancer, etc.

Ans: A pure substance is a substance that contains the same kind of particles and has definite properties….Is Matter around us Class 9 Questions and Answers.

Answer: Pure substances—Water, bread, sugar and gold. Mixtures—Steel, plastic, paper, talc, milk and air.

Compound is a pure substance made up of two or more elements combined chemically in a definite ratio….CBSE Class 9 Chemistry, Is Matter Around Us PureExplore More.

Matter is everything around you. Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).

We, at askIITians, are committed to helping all the students to gain a balanced understanding of all the Science topics in Class 9….Class 9 Science Topics.

Pure substances which are made up of only one kind of atoms are known as elements. They cannot be split up into two or more simpler substances by any of the usual chemical methods. For example, Iron, gold, silver, carbon, oxygen, nitrogen and sodium etc.

Everything around us is made up of matter. For example: – Wood, paper, even human beings are made up of matter. All the matter present around us is not pure. It can be pure or impure.

1.It is a pure form of matter and has a definite composition. 2.It cannot be separated into its chemical constituents by any physical process.

Answer: A pure substance is an element or compound in completely pure state while mixture may contain two or more elements/compounds. Constituents from a mixture can be separated while pure substance remains as a single substance. Example : Copper (pure substance); Air (Mixture).

1. These diseases can be transmitted from an infected person to a healthy person. 1. These diseases cannot be transmitted….Why Do we Fall Ill Class 9 Extra Questions Short Answer Questions-II.

(i) Pure Substance: It consists of single types of particles which are same in their chemical nature. (ii) Mixtures: Mixture consists of two or more particles….Study Material and Notes of Ch 2 Is Matter Around us Pure Class 9th Science.

Suspension is the heterogeneous mixture of two or more substances. In suspension, particles are suspended throughout in bulk and can be seen by naked eyes. Particles of suspension are large enough to scatter rays of light and path of ray is visible through a suspension.

There are three basic types of suspension components: linkages, springs, and shock absorbers.

Tyndall effect, also called Tyndall phenomenon, scattering of a beam of light by a medium containing small suspended particles—e.g., smoke or dust in a room, which makes visible a light beam entering a window.

True Solution is a homogeneous mixture of two or more materials with a particle size of less than 10-9 m or 1 nm dissolved in the solvent. Example: Simple sugar solution in water. Particles can not be isolated from true solutions by using filter paper which is also not apparent to the naked eye.

The characteristics of a true solution are:

• It is a homogeneous mixture of two or more substances .
• The solute parties cannot be seen with the naked eyes.
• It does not shoe tyndall effect.
• The solute particles if the solution cannot be separated by filtration .
• Size of true solution particles is less than 1nm.

True solution is a homogeneous mixture of two or more substances. Step by step solution: A true solution is a homogeneous mixture with uniform properties throughout. From the above explanation we can say that blood, ink, starch are colloidal solutions and sugar sol and salt sol are true solutions.

Terms in this set (9)

• Solid Solute (Liquid) vinegar.
• Liquid Solute (Liquid) Salt water.
• Gas Solute (Liquid) Soft drink.
• Solid Solute (Gas) Mothballs.
• Liquid (Gas) humidity.
• Gas Solute (Gas) air.
• Solid Solute (Solid) gold-silver.
• Liquid Solute (Solid) dental filings.

Some Examples of the Solutions are Listed Below:-

Based on the whether the solvent is water or not, solutions are of two types.

• Aqueous solutions: These solutions have water as the solvent. Examples of such solutions are sugar in water, carbon dioxide in water, etc.
• Non-Aqueous Solutions: These solutions have a solvent that is not water.

Solutions can be classified into 2 types on the basis of whether the solution is water or not, Aqueous Solution:- The solution in which any state of homogeneous compound completely dissolves in water, in which water acts as a solvent. Examples of this kind of solution are sugar/ salt in water, carbon dioxide in water.

A solution is a homogeneous mixture of solvent and solute molecules. A solution can be liquid, solid, or gaseous. Further, a solution can be a mixture of liquids, gases and solids. In some cases, like seawater, the solution consists of a great many different types of solutes, like salts, oxygen, and organic molecules.

bleach (sodium hypochlorite dissolved in water) dishwater (soap dissolved in water) carbonated beverages (carbon dioxide dissolved in water is what gives sodas their fizz) powdered drinks.

Water is the most common solvent. solute – The solute (or solutes) in a solution are the substances (like salt or sugar) that dissolve in the solvent. There is less solute than solvent.

Answer

• A mixture in which components dissolved into each other completely is called solution.
• 5 examples of solution that we use in our daily life are:-
• 1.Sugar & Milk.
• 2.Ink in Water.
• 3.Oxygen in Water.
• 4.Salt in Water.
• 5.Lemon juice in water.

: a dissolved substance especially : a component of a solution present in smaller amount than the solvent. More from Merriam-Webster on solute.

A solute is a substance that can be dissolved by a solvent to create a solution. A solute can come in many forms. It can be gas, liquid, or solid. The concentration of a solute is the amount of solute divided by the total volume of solution. …