Class 9 Science MCQ Chapter 2 Is Matter Around us Pure, Class 9 Science MCQ Question Answer, Class 9 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 9 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 9 Science MCQ Chapter 2 Is Matter Around us Pure Question Answer can be of great value to excel in the examination.
SCERT Class 9 Science MCQ Chapter 2 Is Matter Around us Pure
SCERT Class 9 Science MCQ Chapter 2 Is Matter Around us Pure Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 9 Science MCQ Chapter 2 Is Matter Around us Pure provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.
Is Matter Around us Pure
Chapter – 2
Multiple Choice Questions & Answers
1. Which of the following material fall in the category of a Elements?
(a) Milk
(b) Ice
(c) Iron
(d) Salt
Ans. (c) Iron.
2. Which of the following material fall in the category of a pure substance?
(a) Brick
(b) Wood
(c) Ice
(d) Air
Ans. (c) Ice.
3. Which of the following material fall in the category of a compound?
(a) Brick
(b) Wood
(c) Ice
(d) Air
Ans. (c) Ice.
4. Which of the following is the heterogeneous mixture?
(a) Salt in water
(b) water in alcohol
(c) sugar in water
(d) water in oil
Ans. (d) water in oil.
5. Which of the following as the example of uniform composition?
(a) water in alcohol
(b) water in oil
(c) water in sand
(d) water in cement
Ans. (a) water in alcohol.
6. Which of the following is as the example | of colloidal solution?
(a) lemonade
(b) milk
(c) copper sulphate solution
(d) water in salt
Ans. (b) milk.
7. Which of the following is not as the example heterogeneous mixture?
(a) water in alcohol
(b) salt in water
(c) sugar in water
(d) water in oil
Ans. (d) water in oil.
8. Which of the following substance can not be broken into simpler substance?
(a) water
(b) methane
(c) mercury
(d) sand
Ans. (c) mercury.
9. Majority of the elements are
(a) gas
(b) liquid
(c) not confirm
(d) solid
Ans. (d) solid.
10. Which of the following elements is metalloids?
(a) iron
(b) Boron
(c) Argon
(d) Neon
Ans. (b) Boron.
11. Which of the following is not metal properties?
(a) a lustre
(b) conduct heat and electricity
(c) malleable
(d) not lustrous
Ans. (d) not lustrous.
12. Which of the following is not nonmetal properties?
(a) Sonorous
(b) variety of colours
(c) poor conductor of heat
(d) poor conductors of electricity
Ans. (a) Sonorous.
13. Which of the following mixture shows Tyndall effect?
(a) mixture of copper sulphate and water.
(b) mixture of water and milk.
(c) mixture of water and alcohol
(d) mixture of water and sugar.
Ans. (b) mixture of water and milk.
14. Which of the following mixture is not solution?
(a) air
(b) sea water
(c) soda water
(d) soil
Ans. (d) soil.
15. Which of the following are not chemical changes?
(a) freezing of water
(b) Growth of a plant
(c) Rusting of iron
(d) Burning of a candle.
Ans.(a) freezing of water.
16. Which of the following is not homogeneous mixture?
(a) Soda water
(b) wood
(c) air
(d) vinegar
Ans. (b) wood.
17. The number of elements known at present are more than –
(a) 98
(b) 99
(c) 100
(d) 101
Ans. (c) 100.
18. Elements, become liquid at the temperature 300k, which are they?
(a) gallium and cesium
(b) chromium and cesium
(c) chromium and gallium
(d) Barium and gallium
Ans. (a) gallium and cesium.
19. Two elements are liquid in room temperature, which are they?
(a) Bromine and Iodine
(b) Mercury and Bromine
(c) Mercury and Iodine
(d) Iodine and Fluorine
Ans. (b) Mercury and Bromine.
20. Which of the following element is nonmetal?
(a) iron
(b) Boron
(c) silicon
(d) carbon
Ans. (d) carbon.
21. Which of the following element can make a ringing sound when hit?
(a) Iodine
(b) carbon
(c) iron
(d) sulphur
Ans. (c) iron.
22. Which of the following gas is the smell of rotten eggs?
(a) Carbon dioxide
(b) Hydrogen sulphide
(c) Hydrogen
(d) oxygen
Ans.(b) Hydrogen sulphide.
Very Short Answer Type Questions
1. Write a common examples of colloids.
Ans. fog.
2. What is milk?
Ans. Milk is a mixture of water, fats proteins etc.
3. What do you mean by alloys?
Ans. Alloys are mixture of two or more metals or non metals.
4. What do you mean by a solution?
Ans. A solution is a homogeneous mixture of two or more substance.
5. Write an example of solid solution.
Ans. alloy.
6. Write an example of gaseous solution.
Ans. air.
8. Write an example of liquid solution which we drink.
Ans. Lemonade.
9. What do you mean by saturated solution?
Ans. When no more solute can be dissolved in a solution at a given temperature, it is called, saturated solution.
10. What is called unsaturated solution?
Ans. If the amount of solute contained in a solution is less than the saturation level, it is called an unsaturated solution.
11. What is called tincture of Iodine?
Ans. A solution of iodine in alcohol is called tincture of Iodine.
12. What is brass?
Ans. Brass is alloy. It is a mixture of approxmately 30% zinc and 70% copper.
13. What do you mean by Tyndall effect?
Ans. Particles of colloidal solution can scatter of a beam of light is called the Tyndall effect.
14. What is Mass by mass percentage of a solution?
Mass of solute
Ans.——————————×100
Mass of Solution
15. What is mass by volume percentage of a solution?
Mass of Solute
Ans.——————————×100
Volume of Solution
16. What is a suspension?
Ans. Solids are dispersed in liquids are called suspension.
17. What is colloidal solution?
Ans. The particles are uniformly spread throughout the solution which particles cannot be seen with naked eyes. But it is heterogeneous. The solution is called colloidal solution.
18. Write a similarity of colloid and suspension.
Ans. Colloid and suspension both are heterogeneous.
19. Write a difference between colloidal solution and suspension.
Ans. In suspension, the particles can be seen with naked eyes. But in colloidal solution, the particles can not be seen with naked eyes.
20. Which separation techniques will you apply for the separation of acetone and water mixture?
Ans. distillation.
21. Which separation techniques will you apply for the separation of dyes in black ink?
Ans. Chromatography.
22. Which separation techniques will you apply for the separation kerosene oil from water?
Ans. Separating funnel.
23. Which separation techniques will you apply for the separation ammonium chloride from salt?
Ans. Sublimation.
24. Which separation techniques will you apply for the separation ink from water?
Ans. Evaporation.
25. What are the different proportions of gas found in air?
Ans. (i) oxygen 20% in air.
(ii) Nitrogen 78% in air
(iii) the other gases are very small quantities.
