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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

What do you mean by the inter-molecular spaces? How do they vary in different states of matter? - Physics

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प्रश्न

What do you mean by the inter-molecular spaces? How do they vary in different states of matter?

थोडक्यात उत्तर

उत्तर

INTER-MOLECULAR SPACES “The spacing between the molecules of the matter is called Inter-molecular spaces.”
The inter-molecular spaces in different states of matter:

  • The intermolecular space between solids is absent.
  • The intermolecular space between Liquid is moderate but present.
  • The intermolecular space between gasses is free-flowing and plenty.

Explanation of inter-molecular space: Take water in a measuring cylinder say up to 80 ml. mark. Add 10 gm of salt to it. The volume in the cylinder should increase. On dissolving salt we find volume remains same i.e. up to 80 ml mark. This is because there are spaces in water molecules and salt molecules occupy these spaces and volume remains the same.

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पाठ 1: Matter - Short/Long Answer Questions [पृष्ठ १६]

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सेलिना Concise Physics [English] Class 8 ICSE
पाठ 1 Matter
Short/Long Answer Questions | Q 3 | पृष्ठ १६

संबंधित प्रश्‍न

Fill in the following blanks with suitable words :

An element is made up of only one kind of ........


Which of the following are not compounds ?

Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond


Out of a colloid, solution and a suspension :

which one has the smallest particles ?


100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.

  1. The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
  2. What name is given to solutions like X ?
  3. What name is given to solutions like Y ?
  4. What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
  5. What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?

A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?


Explain the meaning of the term ‘matter’.


Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?


The particles in the matter are extremely small and can be seen even with a powerful microscope.


The physical state of water at 373 K is ______.


The fluidity of solids: ______.


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