Students are advised to practice the NCERT MCQ Questions for Class 9 Science Chapter 2 Is Matter Around Us Pure with Answers Pdf free download is available here. MCQ Questions for Class 9 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Is Matter Around Us Pure Class 9 MCQs Questions with Answers and assess their preparation level.
Is Matter Around Us Pure Class 9 MCQs Questions with Answers
Solving the Is Matter Around Us Pure Multiple Choice Questions of Class 9 Science Chapter 2 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Is Matter Around Us Pure Class 9 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 2 Science Class 9 and cross-check your answers during preparation.
Multiple Choice Questions
Question 1.
What is the boiling point of acetone?
(a) 196°C
(b) 186°C
(c) 78.3°C
(d) 183°C
Answer
Answer: (c) 78.3°C
Question 2.
Who was the first scientist to use the term ‘element’ in 1661?
(a) Robert Boyle
(b) Charles
(c) Antonnie Lorent
(d) None of them
Answer
Answer: (a) Robert Boyle
Question 3.
Boron, silicon, germanium, etc., are:
(a) Metals
(b) Non-metals
(c) Metalloids
(d) None of them
Answer
Answer: (c) Metalloids
Question 4.
The major component of a solution is called:
(a) solute
(b) insoluble
(c) solvent
(d) solution
Answer
Answer: (c) solvent
Question 5.
Which of the following will show the “Tyndall effect”?
(a) Salt solution
(b) Milk and starch solution
(c) Copper sulphate solution
(d) None of them
Answer
Answer: (b) Milk and starch solution
Question 6.
The size of colloidal particles are:
(a) 10-4 – 10-8 m
(b) 10-10 – 10-12 m
(c) 10-2 – 10-4 m
(d) 10-10 – 10-8 m
Answer
Answer: (d) 10-10 – 10-8 m
Question 7.
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)
Answer
Answer: (c) (i), (iii) and (iv)
Question 8.
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
Answer
Answer: (a) (i) and (ii)
Question 9.
Which of the following are homogeneous in nature?
(i) Ice
(ii) Wood
(iii) Soil
(iv) Air
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (iii) and (iv)
Answer
Answer: (c) (i) and (iv)
Fill in the Blanks.
Question 10.
Pure substances can be elements or _________
Answer
Answer: compounds
Question 11.
Metals are good __________ of heat and electricity.
Answer
Answer: conductor
Question 12.
To separate a mixture of two or more miscible liquids for which the difference in boiling points is less than ________ fractional distillation method is used.
Answer
Answer: 25K
Question 13.
The diameter of suspension particles is bigger than ___________
Answer
Answer: 10-5 m
Question 14.
_________ effect originates due to optical properties of a colloidal solution.
Answer
Answer: Tyndall
True/False.
Question 15.
The concentration of a solution is the amount of solute present per unit volume or per unit mass of the solution/solvent.
Answer
Answer: True
Question 16.
Colloids are homogeneous mixtures.
Answer
Answer: False
Question 17.
The solution is a homogeneous mixture.
Answer
Answer: True
Question 18.
The characteristic features of a particular substance obtained from different sources will be different.
Answer
Answer: False
Question 19.
A mixture has a fixed melting point.
Answer
Answer: False
Question 20.
The particles of a suspension can not be filtered out by using filter paper.
Answer
Answer: True
Match the Column.
Question 21.
| A | B |
| 1. Aerosol | (i) Shaving cream |
| 2. Foam | (ii) Coloured gemstone, milky glass |
| 3. Emulsion | (iii) Milk of magnesia, mud |
| 4. Sol | (iv) Milk, face cream |
| 5. Gel | (v) Fog, clouds, mist |
| 6. Solid sol | (vi) Jelly, cheese, butter |
Answer
Answer:
| A | B |
| 1. Aerosol | (v) Fog, clouds, mist |
| 2. Foam | (i) Shaving cream |
| 3. Emulsion | (iv) Milk, face cream |
| 4. Sol | (iii) Milk of magnesia, mud |
| 5. Gel | (vi) Jelly, cheese, butter |
| 6. Solid sol | (ii) Coloured gemstone, milky glass |
Answer in one Word/Sentence.
Question 22.
What is known as ‘tincture iodine’?
Answer
Answer: Solution of iodine and alcohol
Question 23.
Which technique is used to separate two immiscible liquids?
Answer
Answer: By the use of separating funnel
Question 24.
What is a substance composed of two or more elements, chemically combined with one another in a fixed proportion known as?
Answer
Answer: Compound
Question 25.
Name a metallic element found in a liquid state at room temperature.
Answer
Answer: Mercury
Question 26.
How would you separate common salt and iodine from their mixture?
Answer
Answer: By sublimation
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