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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

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 - Chemistry

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प्रश्न

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.

पर्याय

  • True

  • False

MCQ
चूक किंवा बरोबर

उत्तर

True

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पाठ 2: Physical and Chemical Changes - Objective Type Questions

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विराफ जे. दलाल New Simplified Middle School Chemistry [English] Class 7
पाठ 2 Physical and Chemical Changes
Objective Type Questions | Q 2.2

संबंधित प्रश्‍न

What is the physical state of water at 100°C.


For any substance, why does the temperature remain constant during the change of state?


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


The Kelvin temperature is 270 K. What is the corresponding Celsius scale temperature ?


The Kelvin scale temperature is 0 K. What is the corresponding Celsius scale temperature ?


Give the usual name for the following :

Heat required to change the state of a substance without changing the temperature.


Write the relation between Kelvin scale and Celsius scale of temperature.


What is meant by saying that the latent heat of fusion of ice is 3.34 × 105 J/kg ?


Fill in the following blank with suitable words :

The state of matter  called ........................ makes a fluorescent tube (or neon sign bulb) to glow.


Under what conditions heat can be given to a substance without raising its temperature ?


Give reasons:

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


A kind of matter which can sublime is


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.


Why does this happen?

Kerosene left open in a dish disappears.


With reference to the liquid state of matter – answer the following

On heating, the liquid, do the particles gain or lose energy.


Give the reason for the following 

Solids cannot be compressed, but gases are highly compressible.


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.


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