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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Fill in the Blanks with the Correct Words of the Statement Given Below: During Sublimation, a Solid on Heating Turns Directly into _________ and on Cooling Back to __________. - Chemistry

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प्रश्न

Fill in the blanks with the correct words of the statement given below:

During sublimation, a solid on heating turns directly into _________ and on cooling back to __________.

रिक्त स्थान भरें

उत्तर

During sublimation, a solid on heating turns directly into vapour and on cooling back to solid.

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अध्याय 2: Physical and Chemical Changes - Objective Type Questions

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विराफ जे दलाल New Simplified Middle School Chemistry [English] Class 7
अध्याय 2 Physical and Chemical Changes
Objective Type Questions | Q 4.3

संबंधित प्रश्न

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


Tick the most appropriate answer.

Chemical changes involve


Ripening of fruits is a desirable change.


What is the (a) common unit of temperature, and (b) SI unit of temperature ?


If the temperature of an object is 268 K, it will be equivalent to :


The latent heat of fusion of ice is :


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


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 ?\\

Define Intermodular force of attraction


Differentiate between: Miscible and immiscible liquids.


How does a liquid changes into its gaseous state? 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:

Formation of water vapour from water


Give two examples of the following:

Substances which are rigid and not compressible


Explain the term condensation


State the property of the following substance.

Lead chloride reacts with barium sulphate to give a white precipitate of lead sulphate.


Write the properties of this substance.

Water


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

A knife is made of wood.


Why does this happen?

Coconut oil thickens in winter.


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

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


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