Complete the Blank with Reference to Interconversion of Matter on the Basis of Kinetic Theory-with the Word ‘Increase’, ‘Decreases’, ‘Gain’, ‘Lose’, Or ‘Overcome’ in the Following Cas - Chemistry

Advertisements
Advertisements
Fill in the Blanks

Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During vaporization, the liquid particles ____________ energy.

Advertisements

Solution

During vaporization, the liquid particles gain energy.

  Is there an error in this question or solution?
Chapter 1: Matter - Objective type questions

APPEARS IN

Viraf J. Dalal Class 8 New Simplified Middle School Chemistry
Chapter 1 Matter
Objective type questions | Q 5.2

RELATED QUESTIONS

Convert the following temperatures to Kelvin scale.25°C


What is the physical state of water at 25°C.


What do you mean by the change of state? Write the flow chart showing the complete cycle of change of state.


What do you observe when :

water is boiled


What do you observe when :

some ice cubes are kept in a glass tumbler


What do you observe when :

ime is dissolved in water.


Tick (√) the correct alternative from the choice given for the following statement.

When we add water to the following substances, which one will show a chemical change?


Tick the most appropriate answer.

Melting of ice is a


Tick the most appropriate answer.

Chemical changes involve


Dissolving salt in water is a reversible change.


Ripening of fruits is a desirable change.


Give an example of desirable change which can also be undesirable.


Explain why, a small volume of water in a kettle can fill a kitchen with steam.


Explain why, ice at 0° C is more effective in cooling than water at the same temperature.


Define 'melting point' of a substance ? What is the melting point of ice


How is ammonia gas liquefied ?


Define the term 'latent heat of vaporisation' of a liquid. What is the value of the latent heat of vaporisation of water ?


Which of the following process/processes release heat ?

  1. condensation
  2. vaporisation
  3. freezing
  4. melting

When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice during melting :


When water is heated to a temperature x, it gets converted into steam at temperature x by a process called R. And when steam at temperature x is cooled, it gets reconverted into water at the same temperature x by a process called S.

  1. How much is the value of x in Kelvin ?
  2. What is the process R called ?
  3. What is the name of the energy absorbed during the process R ?
  4. What is process S known as ?
  5. What is the name of energy released during the process S known as ?\\

Match the following:

Column A Column B
(a) Evaporation of water (i) Non-periodic change
(b) Milk turning sour (ii) Periodic change
(c) Earthquake (iii) Chemical change
(d) Change of seasons (iv) Physical change
(e) Glowing of bulb (v) Reversible change

Why is an egg kicked out of a bottle when air is blown inside the bottle?


Give reasons:

 How is interconversion of states of matter different from chemical reaction?


Give reasons:

Why a solid does not flow, but a liquid flows?


Water cycle is an example of interconversion of states of water. Explain


Write whether the following statement is true or false:

All solids, on heating, first change to the liquid and then to the gaseous state always


Name the phenomenon which causes the following changes:

Conversion of water into steam


Give two examples of the following:

Substances which are rigid and not compressible


The process by which a solid changes into a liquid is called


Explain the term melting point


Fill in the blanks with the correct word/s from the bracket.

Ice on absorption of heat converts to ‘X’ a process called ____ [vaporization / melting]. ‘X’ changes to water vapour on ____ [heating / cooling]. Water vapour changes back to ‘X’ on ____ [freezing / condensation]. The constant temperature at which ice changes into ‘X’ is called its ____ [fusion point / melting point / boiling point].


In the paragraph below, write ‘solid’, ‘liquid’ or ‘gas’ in each of the brackets depending on the substance referred to just before.

On a bright sunny day, Riya and Gargi are playing with a ball ( ) in the park. Gargi feels thirsty. So, Riya brings tender coconut water ( ) for her. At the same time, a strong breeze ( ) starts blowing and it also begins to rain ( ). They run back into the house ( ), change their clothes ( ), and then their mother gives them a cup ( ) of hot milk ( ) to drink.


Discuss.

Riya pours some water from her bottle into another bottle. Does it change the shape of the water?


Discuss.

Halima picks up a small stone from the ground and puts it in the water in a dish. Does the shape of the stone change?


Write the properties of this substance.

Water


What is it made from? Why?

A sickle to cut sugarcane.


What is it made from? Why?

The sheets used for roofing.


What will happen if....? And why?

A bell is made of wood.


What will happen if....? And why?

Rubber is not fitted on a pair of tongs.


What will happen if....? And why?

A knife is made of wood.


Why does this happen?

Coconut oil thickens in winter.


Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.

Are any new products formed during the above process.


Fill in the blank with the appropriate word of the statement given below:

Change of milk of curd is a _______ change.


State whether the following statement is true or false. If false write the correct statement.

Desirable changes are meaningful, while undesirable changes are unfavourable.


State whether the following statement is true or false. If false write the correct statement.

During physical changes, the composition of the original substance is not altered, but the properties of the original substance are altered.


Fill in the blank with the correct word of the statement given below:

Sublimation is _______ a change of state of matter.


Matter in any state is composed of small particles – molecules, atoms, or ions. Differentiate the terms above in Italics.


State which of the three states of matter Le. solids, liquids or gases – have

(a) No definite volume
(b) A definite shape
(c) High density
(d) No free surfaces
(e) Particles – which diffuse very easily.


What is inter-conversion of matter. Give the meaning of the terms involved in inter-conversion of matter

(a) Melting
(b) Vaporisation
(c) Liquefaction or condensation,
(d) Solidification or freezing
(e) Sublimation.


Select the correct answer from A, B, C, D & E for the statement given below:

The state of matter which has ___________ least density & no free surfaces.


Complete the statement by filling the blank with the correct word given below.

Conversion of vapour [or gas] into a liquid is termed ____________.


Give the reason for the following 

Solids cannot be compressed, but gases are highly compressible.


Give the reason for the following: 

The kinetic energy of molecules of gases is very large & of solids, the least.


Give the reason for the following 

On heating a sublimable solid, the molecules break free & escape from the surface of the solid directly into vapour.


Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in following case.

During the melting of solids, the inter-particles space __________.


Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During liquefaction, the particles ________ energy.


Share
Notifications



      Forgot password?
Use app×