Test: Matter In Our Surroundings - 2

# Test: Matter In Our Surroundings - 2

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## 20 Questions MCQ Test Science & Technology for UPSC CSE | Test: Matter In Our Surroundings - 2

Test: Matter In Our Surroundings - 2 for Class 9 2023 is part of Science & Technology for UPSC CSE preparation. The Test: Matter In Our Surroundings - 2 questions and answers have been prepared according to the Class 9 exam syllabus.The Test: Matter In Our Surroundings - 2 MCQs are made for Class 9 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Matter In Our Surroundings - 2 below.
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Test: Matter In Our Surroundings - 2 - Question 1

### Which of the following statements is incorrect?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 1

Option A ,B and D all shows the property possessed by matter hence C is incorrect.

Test: Matter In Our Surroundings - 2 - Question 2

### Which of the following is not a characteristic of matter?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 2

There is space between particles of matter in liquid and gases. Hence it is called intermolecular spaces .

option B is incorrect.

Test: Matter In Our Surroundings - 2 - Question 3

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

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 3

Kelvin is the SI Unit of measurement of temperatures. It is represented with the Unit Kelvin 'K'.

Temperatures can be converted from Celsius to Kelvin by adding 273 to the Celsius Scale.

We have been given 3 temperatures here which are in the Celsius Scale.

25°C, 38°C and 66°C

To convert all of them to the Kelvin Scale, add 273 to all of them.

25 + 273 = 298 K
38 + 273 = 311 K
66 + 273 = 339 K

Test: Matter In Our Surroundings - 2 - Question 4

Shivam visited an LPG unit and found that the gas can be liquified at specific conditions of temperature and pressure. Help him to identify the correct set of conditions.

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 4

High pressure and low temperature allows the particle to come closer that compresses a liquid to form gas.

Test: Matter In Our Surroundings - 2 - Question 5

The property to flow is unique to fluids. Which one of the following statements is correct?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 5

Because liquid and gases have the tendency to flow.

Test: Matter In Our Surroundings - 2 - Question 6

Which of the following is correct order of forces of attraction?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 6

solids have more force of attraction than liquids and gases.

Test: Matter In Our Surroundings - 2 - Question 7

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

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 7

Increase in temperature of water increases kinetic energy hence increases rate of evaporation.

Test: Matter In Our Surroundings - 2 - Question 8

Choose the correct statement out of the following.

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 8

Test: Matter In Our Surroundings - 2 - Question 9

Which one of the following sets of phenomenon would increase on raising the temperature?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 9

Evaporation ,diffusion and expansion of gases increase the temperature. Evaporation rate increases because of increasing temperature ,kinetic energy of molecules increases , so the molecules present at the surface of the liquid leave the surface quickly and go into the vapour state.

Test: Matter In Our Surroundings - 2 - Question 10

Which of the following conditions will increase the rate of evaporation?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 10

In evaporation when the temperature is increased the molecules gain kinetic energy and molecules start to move faster and in order to become ga, it must overcome intermolecular forces between different molecules. Increasing the speed, molecules break free from bonds and evaporates.

Test: Matter In Our Surroundings - 2 - Question 11

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.

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 11

Low temperature and high pressure are required to liquefy gases to liquids. There is a lot of space between the particles of a gas. On applying high pressure, the particles of gas move get so close that they start attracting each other sufficiently forming a liquid. When gas is compressed too much, heat is produced, so it is necessary to cool it. Cooling lowers the temperature of compressed gas and helps in liquefying it. Hence, a gas can be liquefied by applying high pressure and lowering the temperature (cooling).

Test: Matter In Our Surroundings - 2 - Question 12

Which of the following is correct order of density?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 12

Solids have more density than liquids and gases.

Test: Matter In Our Surroundings - 2 - Question 13

As the solid melts to form liquid,

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 13

All three phenomena occurs when solid melts to form liquid hence option D is correct.

Test: Matter In Our Surroundings - 2 - Question 14

The physical state of a matter depends upon

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 14

Temperature and pressure both controls  the state of a matter.

Test: Matter In Our Surroundings - 2 - Question 15

Which of the following does not affect the rate of evaporation?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 15

Insoluble impurities do not affect the rate of evaporation.

Test: Matter In Our Surroundings - 2 - Question 16

Latent heat of fusion is amount of

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 16

The heat  energy  required  to change  the state  of unit mass of  a substance  is called  latent  heat.  As the given solid is of unit mass  ( 1 kg)   and  we have  to change   its state into  liquid  , therefore  heat  needed will  be specific  latent heat of  fusion.

Test: Matter In Our Surroundings - 2 - Question 17

Which of the following does not undergo sublimation?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 17

Sublimation is when a solid changes directly to gas without changing into liquid.
NaCl when heated does not change its state when heated , while all the other options sublime. Hence sodium chloride is the right answer.

Test: Matter In Our Surroundings - 2 - Question 18

Which of the following is not correct?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 18

SI unit of pressure is Pascal

Test: Matter In Our Surroundings - 2 - Question 19

Solids do not flow because

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 19

Any thing flows due to weaker intermolecular forces between them.

Test: Matter In Our Surroundings - 2 - Question 20

Which of the following can not be separated by sublimation?

Detailed Solution for Test: Matter In Our Surroundings - 2 - Question 20

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Ammonium chloride, Camphor, Anthracene, Naphthalene can sublime but common salt cannot sublime.

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