MCQ Questions for Class 9 Science Chapter 1 Matter in Our Surroundings
Solving the Matter in Our Surroundings Multiple Choice Questions of Class 9 Science Chapter 1 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Matter in Our Surroundings 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 1 Science Class 9 and cross-check your answers during preparation.
Multiple Choice Questions
Question 1.
The mass per unit volume of a substance is:
(a) acceleration
(b) density
(c) velocity
(d) weight
Answer
Answer: (b) density
Question 2.
The melting point of ice is:
(a) 273.16 K
(b) 723.16 K
(c) 263.16 K
(d) 373 K
Answer
Answer: (a) 273.16 K
Question 3.
What is dry ice?
(a) Solid carbon dioxide
(b) Nitrogen oxide
(c) Carbon mono oxide
(d) None of them
Answer
Answer: (a) Solid carbon dioxide
Question 4.
Which of the following state is responsible for the glow in the sun and stars?
(a) Solid
(b) Liquid
(c) Plasma
(d) Gas
Answer
Answer: (c) Plasma
Question 5.
Which of the following phenomenon takes place when we add a drop of Dettol into the water?
(a) osmosis
(b) diffusion
(c) sublimation
(d) none of them
Answer
Answer: (b) diffusion
Question 6.
During summer, water kept in an earthen pot becomes cool because of the phenomenon of:
(a) diffusion
(b) transpiration
(c) osmosis
(d) evaporation
Answer
Answer: (d) evaporation
Question 7.
Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of the water
(b) Decrease in temperature of the water
(c) Less exposed surface area of water
(d) Adding common salt to the water
Answer
Answer: (a) Increase in temperature of the water
Fill in the Blanks.
Question 8.
Early Indian philosophers classified matter into _______ basic forms or elements.
Answer
Answer: five
Question 9.
The common unit of measuring volume is ________
Answer
Answer: litre
Question 10.
With increase in temperature the kinetic energy of the particles _________
Answer
Answer: increases
Question 11.
The rate of diffusion of liquids is _______ than that of solids.
Answer
Answer: higher
Question 12.
To change a temperature on the Kelvin scale to the Celsius scale you have to subtract ________ from the given temperature.
Answer
Answer: 273
Question 13.
______ is the amount of water vapour present in the air.
Answer
Answer: Humidity
True/False.
Question 14.
Gases are highly compressible as compared to solids and liquids.
Answer
Answer: True
Question 15.
Liquids have fixed volume and shape.
Answer
Answer: False
Question 16.
Compressed natural gas (CNG) is used as fuel these days in vehicles.
Answer
Answer: True
Question 17.
The state of matter cannot be changed by changing temperature or pressure.
Answer
Answer: False
Question 18.
The states of matter are inter-convertible.
Answer
Answer: True
Question 19.
In solids, the space between the particles is maximum.
Answer
Answer: False
Match the Column.
Question 20.
| A | B |
| 1. Unit of temperature | (i) Kilogram (kg) |
| 2. S.I. unit of mass | (ii) Kilogram per cubic metre |
| 3. S.I. unit of pressure | (iii) Newton |
| 4. Unit of weight | (iv) Kelvin |
| 5. Unit of density | (v) Pascal |
Answer
Answer:
| A | B |
| 1. Unit of temperature | (iv) Kelvin |
| 2. S.I. unit of mass | (i) Kilogram (kg) |
| 3. S.I. unit of pressure | (v) Pascal |
| 4. Unit of weight | (iii) Newton |
| 5. Unit of density | (ii) Kilogram per cubic metre |
Answer in one Word/Sentence.
Question 21.
What is that process known as in which a solid is converted directly into the gaseous state without coming to a liquid state?
Answer
Answer: Sublimation
Question 22.
How many states of matter exist normally in nature?
Answer
Answer: Three states
Question 23.
What is that temperature called at which solid melts to become a liquid at the atmospheric pressure?
Answer
Answer: Melting point
Question 24.
What is the state of matter which has maximum compressibility?
Answer
Answer: Gaseous state
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