Matter in Our Surrounding Test

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Matter in Our Surrounding Test - 14

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Weekly Quiz Competition

Question 1
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What is the order of the three states of matter when they are arranged in the decreasing order of the compressibility of their molecules?

A
Gas → Solid → Liquid

B
Gas → Liquid → Solid

C
Liquid → Solid → Gas

D
Liquid → Gas → Solid

Solution

In solids, the molecules are closely packed. As a result, the intermolecular force of attraction among the molecules is the strongest in solids. This implies that solid molecules are least compressible.

In liquids, the molecules are less closely packed. As a result, their intermolecular force of attraction is much weaker than that in solids. Hence, liquids have slightly higher compressibility than solids.

In gases, the molecules are far apart from one another. As a result, the intermolecular force of attraction among the molecules is almost negligible in gases. This implies that gases are highly compressible.

Hence, the decreasing order of the three states of matter according to the compressibility of their molecules is

Gas → liquid → solid

The correct answer is B.
Question 2
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Which of the following substances has a definite volume and can take the shape of the container in which it is poured?

A
Stone

B
Brick

C
Coconut oil

D
Water vapour

Solution

Coconut oil is a liquid. Its constituting particles are loosely packed as compared to the constituting particles in solids. Thus, coconut oil has a definite volume, but it takes the shape of the container in which it is poured.

Hence, the correct answer is option C.
Question 3
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Use the following information to answer the below question.

Martha mixed some marble powder with dry ice. On keeping the mixture in the open air for a few minutes, the dry ice vanished and only the dry powder was left behind.

The dry ice vanished because of

A
evaporation.

B
sublimation.

C
condensation.

D
freezing.

Solution

The dry ice gets directly converted from the solid-state to the gaseous state, without passing through the liquid state. This process is known as sublimation.

Hence, the correct answer is option B.
Question 4
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Water can be turned into ice by

A
exposing it to heat

B
stirring it vigorously

C
adding common salt to it

D
reducing its temperature

Solution

Reducing the temperature of water, till it gets reduced to 0ºC, causes it to crystallize leading to the formation of ice.

The correct answer is D.

Question 5

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Use the following information to answer the next question.

Sugar refers to sucrose, a white crystalline solid disaccharide. Humans use sugar for altering the flavor and properties of beverages and food.

Sugar syrup is obtained from crystalline sugar by

melting

crystallization

condensation

freezing

Solution

Crystalline sugar has a melting point around 160 − 180°C. When crystalline sugar is heated above this temperature it melts to form sugar syrup.

The correct answer is A.

Question 6
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If normal ice had been kept in place of the dry ice, and the mixture had been exposed to room temperature for a few minutes, then it would result in the

A
melting of ice

B
sublimation of ice

C
dissolution of the marble powder

D
heating up of the mixture

Solution

Normal ice is crystallized form of water and melts at room temperature whereas dry ice is solidified carbon dioxide which sublimates directly to the vapor state from the solid state.

The correct answer is A.
Question 7
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The molecular motion is the maximum in which state of matter?

A
Solid

B
Liquid

C
Gaseous

D
Plasma

Solution

In the gaseous state, the bonding between the molecules of matter is less as compared to that in other states of matter. The molecules are less closely packed in gaseous state because of the weak bonding between the molecules. So, the molecules have more spaces to move freely in the gaseous state.

The correct answer is C.
Question 8
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Crystalline solids have

A
sharp melting points

B
only short-range bond order

C
indefinite geometrical shapes

D
disordered molecular or ionic arrangements

Solution

Crystalline solids get converted into the liquid state at a fixed temperature. They have sharp melting points.

The correct answer is A.

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Re-Attempt Weekly Quiz Competition

Matter in Our Surrounding Test - 14

Result

Matter in Our Surrounding Test - 14

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SHARING IS CARING

Question 1

Gas → Solid → Liquid

Gas → Liquid → Solid

Liquid → Solid → Gas

Liquid → Gas → Solid

Solution

Question 2

Stone

Brick

Coconut oil

Water vapour

Solution

Question 3

evaporation.

sublimation.

condensation.

freezing.

Solution

Question 4

exposing it to heat

stirring it vigorously

adding common salt to it

reducing its temperature

Solution

Question 5

melting

crystallization

condensation

freezing

Solution

Question 6

melting of ice

sublimation of ice

dissolution of the marble powder

heating up of the mixture

Solution

Question 7

Solid

Liquid

Gaseous

Plasma

Solution

Question 8

sharp melting points

only short-range bond order

indefinite geometrical shapes

disordered molecular or ionic arrangements

Solution

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