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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

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

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

संबंधित प्रश्न

The molecules can move freely anywhere in


Give one difference between atoms and molecules.


Define the following term  of Atom .


Describe in your own words, what happens to the particles when salt dissolves in water.


An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.


What are the three general classes of matter ? Give one example of each type.


Choose the correct answer.

A 15% alcohol solution means :


What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?


Tincture of iodine has antiseptic properties. This solution is made by dissolving :


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 ?

Name the source from which nitrogen and oxygen are obtained on a large scale.


Fill in the following blanks with suitable words :

Miscible liquids are separated by .....................


Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.


The dyes present in fountain pen ink can be separated by the technique of :


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There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :

(a) Which process will you use to separate a mixture of A and B ?

(b) Which method will you use to separate a mixture of B and C ?

(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.


Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.


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 ?


What type of matter glass is?


Define the term matter.


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