Telangana SCERT Class 9 Physical Science Chapter 6 Is Matter Pure Solution

Telangana SCERT Class 9 Physical Science Chapter 6 Solution – Is Matter Pure. Here in this post we provides Class 9 Physical Science Is Matter Pure Telangana State Board Solution. Telangana State Board English Class IX Medium Students can download this Solution to Solve out Improve Your Learning Questions and Answers.

Telangana State Board Class 9 Physical Science Chapter 6 Is Matter Pure Solution:

 

CHAPTER: – 6.

Is Matter Pure

 

Exercise: –

Reflections on concepts

1)Which separation techniques will you apply

for the separation of the following? (AS1)

(a) Sodium chloride from its solution in water.

(b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

(c) Mixture of oil and water.

(d) Fine mud particles suspended in water.

Ans: –

• Sodium chloride from its solution is separated by evaporation process.
• Ammonium chloride from a mixture containing sodium chloride is separated by sublimation process.
• The mixture of oil and water is separated by distillation process.
• The mud particles in water found in down the tube after centrifugation.

 

2) Explain the following giving examples. (AS1)

(a) Saturated solution: – The saturated solution is the solution in which there is no any such substance which can be diluted in that or came to maximum limit.

(b) Pure substance: – The solution which is made up of just only one types of solutes in it then this solution known as the pure solution.

(c) colloid: – The particles in any solution if its size is between the size of pure and suspension then we can say that this solution is colloid which seen by passing light through it.

 (d) Suspension: – In suspension the particles don’t dissolve to much in solution.

 

3) Classify the following into elements, compounds and mixtures. (AS1)

(a) Sodium (b) Soil (c) Sugar solution (d) Silver

(e) Calcium carbonate (f) Tin (g) Silicon (h) Coal (i) Air

(j) Methane (k) Carbon dioxide (l) Sea water.

Ans: – Elements: – silver, Tin, silicon, sodium.

Compound: – calcium carbonate, carbon dioxide, methane.

Mixture: – soil, sugar solution, coal, sea water.

 

Application of concepts

1) Determine the mass-by-mass percentage concentration of a 100g salt solution which contains 20g salt? (AS1)

Ans: – The mass-by-mass percentage= (mass of solute/mass of solution) × 100.

So, mass by mass percentage= 20/100 × 100=20%.

 

2) Calculate the concentration in terms of mass by volume percentage of the solution containing 2.5g potassium chloride in 50ml of potassium chloride (KCl) solution? (AS1)

Ans: – The mass-by-mass percentage= (mass of solute/volume of solution) × 100.

So, mass by mass percentage of potassium chloride= 2.5/50×100=5%.

 

3) Classify the following substances in the below given table. (AS1)

Ink, soda water, brass, fog, blood, aerosol sprays, fruit salad, black coffee, oil and water, boot polish, air, nail polish, starch solution, milk.

Ans: – Solution: – ink, soda water, blood, brass, starch solution.

Suspension: – fruit salad, oil and water.

Colloid: – air, milk, aerosol spray, nail polish, boot polish.

 

Higher Order Thinking Questions

 

1) Use the words given below and write the steps for making tea (AS7)

Solution, solvent, solute, dissolve, soluble, insoluble, filtrate and residue.

Ans: – For the making of tea we need some amount of water as a solution, for the solvent as tea leaves and milk and sugar, then make solute, after heating the solution filtrate the remaining tea leaves and make completing tea.

 

MULTIPLE CHOICE QUESTIONS.

1.) The machine used to separate the massive particles and light particles from a mixture is: –

a) Atwood machine b) Centrifuge c) Filter paper d) Separating funnel.

Ans: – option (b).

 

2.) Which is not formed by the physical mixing of two substances

a) Mixture b) Compound c) Colloid d) Suspension.

Ans: – option (d).

 

3.) The substance which is relatively less in quantity in a solution is

a) Solute b) Solvent c) Dispersion phase d) Dispersion medium.

Ans: – option (d).

 

4.) The amount of solute present in a saturated in 100g. at constant temperature is known as its

a) Solubility b) Concentration c) Volume percentage d) Weight percentage.

Ans: – option (d).

 

5.) If the quantity of solute is more in a solution, then the solution is said to be

a) Saturated solution b) Dilute Solution

c) Concentrated solution d) Unsaturated Solution.

Ans: – option (a).

6.) The phenomenon of scattering of a visible light by the particles of colloid is known as

a) Tyndall effect b) Chromatography c) Sublimation d) Reflection.

Ans: – option (a).

7.)  Immiscible liquids can be separated by

a) Distillation process b) Fractional distillation

c) Chromatography d) Separating funnel.

Ans: –option (d).

8.)  Miscible liquids can be separated by

a) Distillation process b) Fractional distillation

c) Chromatography d) Separating funnel.

Ans: – option (b).