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Effect Of Heat And Pressure On Matter Free Doubts and Solutions

CBSE - IX - Chemistry - Matter in Our Surroundings

can matter change its state  

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CBSE - IX - Chemistry - Matter in Our Surroundings

Why gases exert pressure

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CBSE - IX - Chemistry - Matter in Our Surroundings

The two gases which are supplied in compressed form in homes and hospitals

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CBSE - IX - Chemistry - Matter in Our Surroundings

why ice is rubbed on the burnt part of the skin?

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CBSE - IX - Chemistry - Matter in Our Surroundings

If liquid is evaporated on room temperature then it lead to which effect

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CBSE - IX - Chemistry - Matter in Our Surroundings

Why steam produced during boiling of water has additional latent heat of vapourisation ?  

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CBSE - IX - Chemistry - Matter in Our Surroundings

What is sublimation? Name the common substances which undergo sublimation.

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CBSE - IX - Chemistry - Matter in Our Surroundings

Freezing is the reverse of melting. Explain.

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CBSE - IX - Chemistry - Matter in Our Surroundings

IT IS SAID THAT SOLID HAS NO BOILING POINT , BUT LIQUID HAS. SO, WHAT DO WE CALL BOILING OF VEGETABLES AS?

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CBSE - IX - Chemistry - Matter in Our Surroundings

what is matter please elaburate

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CBSE - IX - Chemistry - Matter in Our Surroundings

What are the two factors responsible for interconversion of matter?

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CBSE - IX - Chemistry - Matter in Our Surroundings

Why is solid carbon dioxide called dry ice? Give two uses of dry ice.

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CBSE - IX - Chemistry - Matter in Our Surroundings

(a) What is the value of latent heat of fusion of ice? (b) Why is ice at 273 K more effective in cooling than water at the same temperature?  

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CBSE - IX - Chemistry - Matter in Our Surroundings

Give reasons for the following. Thermometer reading remains constant for a while during melting of a solid even though we continue to heat the solid.  

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CBSE - IX - Chemistry - Matter in Our Surroundings

What is the common unit of measuring temperatures like melting points? How is it written in short form?

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CBSE - IX - Chemistry - Matter in Our Surroundings

The following triangle exhibits inter conversion of the three states of matter. Complete the triangle by labeling the arrows marked A, B, C and D.  

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CBSE - IX - Chemistry - Matter in Our Surroundings

Answer the following questions. (a)Why is dry ice more effective for cooling purposes than ordinary ice? (b)Name the two gases which are supplied in compressed form in homes and hospitals. (c) How is cooling of a gas done during its liquefaction?  

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CBSE - IX - Chemistry - Matter in Our Surroundings

Explain the process shown in the figure below:  

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CBSE - IX - Chemistry - Matter in Our Surroundings

With the help of a labelled diagram, describe in brief an activity to show sublimation of ammonium chloride.

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CBSE - IX - Chemistry - Matter in Our Surroundings

Explain which one will cause more severe burns - boiling water at 100oC or steam?

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CBSE - IX - Chemistry - Matter in Our Surroundings

(a) Why the temperature of boiling water does not rise even when heat is continuously supplied to it? (b) Why does our hand feels cold when a little of spirit is put on it?  

Asked by Topperlearning User 23rd March 2016, 4:47 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Why does our palm feels cold on holding a piece of ice for a while?

Asked by Topperlearning User 23rd March 2016, 4:33 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

What is dry ice? What happens when the pressure under which it is stored is decreased to 1 atmosphere?

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CBSE - IX - Chemistry - Matter in Our Surroundings

What is the significance of the melting point temperature of a solid?

Asked by Topperlearning User 23rd March 2016, 4:30 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

the temp of ice is same as that of cold water?why?

Asked by nisha_vini29 10th May 2015, 8:47 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

how can the melting point of ice be same as the freezing point of water?

Asked by sukriti.dhaliwal 9th May 2015, 11:38 AM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Please tell me the clear definition of latent heat of vaporisation.

Asked by Harshit Saini 13th April 2015, 4:11 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

what is the process of sublimation?
why camphor is dissaphere in room temperature ?what is the use of camphor ? how camphor is made?
 

Asked by Mukesh Mohan 15th September 2014, 10:13 AM
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CBSE - IX - Chemistry - Matter in Our Surroundings

What is latent heat of vaporization?

Asked by Topperlearning User 19th August 2014, 4:06 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

what is the effect of pressure and temperature in high altitude

Asked by abhraghosh9 29th July 2014, 10:35 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

what is the latent heat of fusion!!
 

Asked by Vishesh 6th June 2014, 2:20 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

why should we wear cotton clothes in summer?
 

Asked by Rajveer Singh Parihar 31st May 2014, 12:42 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Why cooking of food takes longer time on mountains and lesser in pressure cooker?

Asked by Ishrit Gupta 14th May 2014, 4:36 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Why is dry ice stored under high pressure?

Asked by Topperlearning User 6th May 2014, 1:38 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

(a)Dry ice is compressed at high pressure. What happens when the pressure is released? (b)Why is it necessary to cool the gas while applying pressure to liquefy?

Asked by Topperlearning User 6th May 2014, 1:36 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Why is steam better than boiling water for heating purposes?

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CBSE - IX - Chemistry - Matter in Our Surroundings

What is a phase transition?

Asked by Topperlearning User 6th May 2014, 1:24 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

The latent heat of vaporisation of water is 22.5 x 105 joules per kilogram. What does this statement mean?

Asked by Topperlearning User 6th May 2014, 1:20 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

What is the significance of the word 'latent' in latent heat? Name the two types of latent heat.

Asked by Topperlearning User 6th May 2014, 1:19 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

Which phenomenon occurs during the following changes: 1. Size of naphthalene balls decreases. 2. Solid wax when heated. 3. Formation of clouds. 4. Water heated upto 100oC.

Asked by Topperlearning User 6th May 2014, 1:16 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

The boiling point of mercury is 357oC. What inference can you make out from this statement?

Asked by Topperlearning User 6th May 2014, 1:14 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

What do you understand by the term melting point? What is the melting point of ice in Kelvin?

Asked by Topperlearning User 6th May 2014, 1:12 PM
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CBSE - IX - Chemistry - Matter in Our Surroundings

what produces more severe burn,boilingwater or steam?

Asked by 23rd April 2008, 4:45 PM
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