हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

What Are the Two Conditions for the Interconversion of States of Matter ? - Chemistry

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प्रश्न

What are the two conditions for the interconversion of states of matter ?

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उत्तर

Two conditions are : change in

  1. Temperature
  2. Pressure
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अध्याय 1: Matter and Its Composition - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 1 Matter and Its Composition
Additional questions | Q 14

संबंधित प्रश्न

Select the correct alternative

The molecules can move freely anywhere in

  1. gases
  2. liquids
  3. solids
  4. none of the above

Explain why air is used to inflate tyres.


In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?


During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :


Name the property which allows metals to be hammered into thin sheets.


Draw a flow-chart for the schematic representation of different types of matter.


How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this  solution is cooled to 10°C ?


One of the following is a solid foam. This one is :


What difference in the property of two miscible liquids enables their separation by fractional distillation ?


Fill in the following blanks with suitable words :

Immiscible liquids are separated by using a .....................


Fill in the following blanks with suitable words :

The gases of air can be separated by fractional distillation of liquid air because they have different..............


Describe the method of separating a mixture containing common salt, sand and ammonium chloride.


The material which is added to water during purification process at the water works so as to disinfect it is :


Which one of the following scrap metal cannot be separated by magnetic separation ?


The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.

(a) What do you think could (i) constituent A, and (ii) liquid D be ?

(b) What could (i) constituent B, and (ii) liquid E be ?

(c) What could liquid C be ?

(d) How will you separate the mixture containing A, B and C ?


If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?


The most reactive metal is ______.


Atoms or groups of atoms having a charge are called ______.


Gases change to liquid by the process of ______.


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