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.

Q1

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
Q2

Which one of the following set of phenomena would increase on raising the temperature?

[A]. Diffusion, evaporation, compression of gases
[B]. Evaporation, compression of gases, solubility
[C]. Evaporation, diffusion, expansion of gases
[D]. Evaporation, solubility, diffusion, compression of gases




Q3

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
Q4

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?

[A]. Water, air, wind
[B]. Air, sugar, oil
[C]. Oxygen, water, sugar
[D]. Salt, juice, air




Q5

The evaporation of water increases under the following conditions:

[A]. Increase in temperature, decrease in surface area
[B]. Increase in surface area, decrease in temperature
[C]. Increase in surface area, rise in temperature
[D]. Increase in temperature, increase in surface area, addition of common salt
Q6

During summer, water kept in an earthen pot becomes cool because of the phenomenon of

[A]. Diffusion
[B]. Transpiration
[C]. Osmosis
[D]. Evaporation



Q7

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
Q8

Pooja 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]. The process of liquid changing into vapour or gas even below its boiling point is called evaporation.
[B]. The rate of evaporation increases on increasing the temperature of the liquid.
[C]. The rate of evaporation decreases on increasing the surface area of the liquid.
[D]. When the humidity of air is low then the rate of evaporation is high and water evaporates more easily.



Q9

Which one of the following statements is not true?

[A]. The molecules in a solid vibrate about a fixed position
[B]. The molecules in a liquid are arranged in a regular pattern
[C]. The molecules in a gas exert negligibly small forces on each other, except during collisions
[D]. The molecules of a gas occupy all the space available
Q10

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.
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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