Class 9 Science Chapter 1 MCQ

Class 9 Science Chapter 1 MCQ (Multiple Choice Questions) of Matter in Our Surroundings. Prepare here for school exams or class test with objective type questions with explanation and answers.

All the MCQs are taken from NCERT Textbook only and answers also confined to course book of standard 9 science. These questions not only ensure you scoring good marks but it clears all doubts related to chapter 1 of grade 9 science.

Class 9 Science Chapter 1 MCQ Online Test for 2020-2021

Class: 9Science
Chapter: 1Matter in Our Surroundings
Contents:MCQ Online Test with answers

Class 9 Science Chapter 1 MCQ with Answers for 2020-21

Class 9 Science Chapter 1 MCQ Online Test with answers and explanation. All the questions are taken from intext and Exercises part of NCERT Books for class 9 Science issued for academic session 2020-2021. Explanation of answers will help you to understand questions in depth. Practice these questions to score more in less time.


Consider the following statements and choose the incorrect one:

[A]. The particles which make up matter are atoms or molecules.
[B]. The evidence for the existence of particles in matter and their motion comes from the experiments on diffusion and Brownian motion.
[C]. When a crystal of potassium permanganate is placed in a beaker of water, the water slowly turns purple on its own.
[D]. The bromine vapor is less-heavier than air.

Which condition out of the following will increase the evaporation of water?

[A]. Increase in temperature of water
[B]. Decrease in temperature of water
[C]. Less exposed surface area of water
[D]. Adding common salt to water


On converting 25°C, 38°C and 66°C to Kelvin scale, the correct sequence of temperature will be

[A]. 298 K, 311 K and 339 K
[B]. 298 K, 300 K and 338 K
[C]. 273 K, 278 K and 543 K
[D]. 298 K, 310 K and 338 K

Consider the following statements and choose the correct one(s):

[A]. The space between the particles are the minimum in solids, a little more in liquids and the maximum in gases.
[B]. The forces of attraction between the particles are the strongest in solids, less strong in liquids, and negligible in gases.
[C]. The movement of particles is the minimum in solids, more in liquids and maximum in gases.
[D]. All the above.


In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. The sun and other stars glow because of the presence of plasma in them.
[B]. Plasma can also be made on the earth by passing electricity through gases at very low pressure taken in a glass tube.
[C]. Plasma is a fifth state of matter.
[D]. None of the above.

Priya is writing some statements, choose the correct statement and help him:

[A]. We are able to sip hot tea faster from a saucer than from a cup.
[B]. A desert cooler cools better on a hot and dry day.
[C]. A fan increases the rate of evaporation of sweat or moisture from our skin and make us feel cool and comfortable.
[D]. All the above.


Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions

[A]. Low temperature, low pressure
[B]. High temperature, low pressure
[C]. Low temperature, high pressure
[D]. High temperature, high pressure

When a gas jar full of air is placed upside down on a gas jar full of bromine vapors, the red-brown vapors of bromine from the lower jar go upward into the jar containing air. In this experiment:

[A]. Air is heavier than bromine
[B]. Both air and bromine have the same density
[C]. Bromine is heavier than air
[D]. Bromine cannot be heavier than air because it is going upwards against gravity


In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. The temperature at which a solid substance melts and changes into a liquid at atmospheric pressure is called melting point of the substance.
[B]. When a solid is heated sufficiently it changes its physical state and becomes a liquid.
[C]. The melting point of a solid is a measure of the force of attraction between its particles as atoms or molecules.
[D]. All the above.

Read the following sentences carefully, and choose the correct one:

[A]. The spreading of purple colour of potassium permanganate into water, on its own, is due to the diffusion of potassium permanganate particles into water.
[B]. The spreading of ink in water, on its own, is due to the diffusion of ink particle into water.
[C]. The diffusion of a solid substance into another solid substance is so slow that many people think that diffusion does not take place in solids.
[D]. All the above.
Why do gases exert pressure on the walls of container?

In the gaseous state, the particles move about randomly at high speed and because of this random movement, the particles hit each other and also the walls of the container. That is why, they exert pressure on the walls of container.

What do you understand by latent heat of fusion?

The amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of fusion.

What is Dry Ice?

Solid CO2 gets converted directly to gaseous state on decrease of pressure to 1 atmosphere without coming into liquid state. This is known as Dry Ice.

What do you know about the state of Plasma?

The state consists of super energetic and super excited particles. These particles are in the form of ionised gases. The plasma glows with a special colour depending on the nature of gas. The Sun and the stars glow because of the presence of plasma in them. The plasma is created in stars because of very high temperature.

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