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.


Which of the following statement is or are incorrect?

[A]. The pollen grains move on the surface of water because they are constantly being hit by the fast-moving particles of water.
[B]. When a beam of Sunlight enters a room, we can see tiny dust particles suspended in air which are moving rapidly in a very haphazard way.
[C]. The zigzag movement of the small particles suspended in a liquid or gas is called Brownian motion.
[D]. The particles of matter do not attract each other.

The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

[A]. 306 K, 329 K, 391 K
[B]. 308 K, 329 K, 392 K
[C]. 308 K, 329 K, 391 K
[D]. 329 K, 392 K, 308 K


Gunja is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Gunja wants to take help from you:

[A]. There are some forces of attraction between the particles of matter which bind them together.
[B]. The force of attraction is maximum in the particles of solid matter and minimum in the particles of gases matter.
[C]. A material which can flow easily and requires a vessel to keep it called fluid.
[D]. All the above

When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporization:

[A]. Rises very slowly
[B]. Rises rapidly until steam is produced
[C]. First rises and then becomes constant
[D]. Does not rise at all


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.

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

[A]. Ammonia gas can be liquefied by applying high pressure and lowering the temperature.
[B]. Solid carbon dioxide is stored under less-high pressure.
[C]. The conversion of solid carbon dioxide into carbon dioxide gas is a change of state which is caused by the increase in pressure and decrease atmospheric temperature.
[D]. Whatever be the temperature at which evaporation take place, the latent heat of vaporization need not be supplied whenever a liquid change into vapour or gas.


Which of the following represent the suitable conditions for the liquefaction of gases?

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

Pankush appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. Perspiration or sweating is our body’s method of maintaining a constant temperature.
[B]. All the water on the earth does not get evaporated due to the high value of the latent heat of vaporization of water.
[C]. During hot summer days, water is usually kept in an earthen pot to keep it cool.
[D]. All the above


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.

Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. When a liquid freeze to form a solid an equal amount of heat is given out.
[B]. Ice at 0 degree Celsius is more effective in cooling a substance than water at 0 degree Celsius.
[C]. The latent heat of vaporization of water is 22.5 x 10 to the power 5 J/kg.
[D]. Once the water has begun to boil, the temperature gradually rises at hundred degree Celsius until all the water has changed into steam but many people thinks it remains constant.
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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