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Arrange the following substances in increasing order of forces of attraction between particles - water, sugar, oxygen - Science

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प्रश्न

Arrange the following substances in increasing order of forces of attraction between particles -

water, sugar, oxygen

लघु उत्तर

उत्तर

  • Sugar is a solid; the forces of attraction between the particles of sugar are strong. Water is a liquid; the forces of attraction here are weaker than sugar. Oxygen is a gas; the forces of attraction are the weakest in gases.
  • Thus, the increasing order of forces of attraction between the particles of water, sugar and oxygen is
  • Oxygen < Water < Sugar.
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पाठ 1: Matter in Our Surroundings - Exercises [पृष्ठ १२]

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एनसीईआरटी Science [English] Class 9
पाठ 1 Matter in Our Surroundings
Exercises | Q 4 | पृष्ठ १२

संबंधित प्रश्‍न

Give reasons:

We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.


Why do gases have neither a fixed shape nor a fixed volume?


Look at the diagram on the right side. Jar A contains a red-brown gas whereas jar B contains a colourless gas. The two gas jars are separated by a galas plate placed between them

  1. What will happen when the glass plate between the two jars is pulled away?
  2. What name is given to the phenomenon which takes place?
  3. Name the brown gas which could be in jar A.
  4. Which is the colourless gas most likely to be present in jar B?
  5. Name one coloured solid and one colourless liquid which can show the same phenomenon.


The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.

  1. Name the substances (i) X (ii) Y and (iii) Z.
  2.  What is the process of conversion of X into Y known as ?
  3. At which temperature X gets converted into Y ?
  4. What is the process of conversion of X into Z known as ?
  5. At which temperature X gets converted into Z ?

Why do gases not have fixed shape?


Comment upon the following:-

kinetic energy


Comment upon the following:-

density


Explain why?

  1. A gas fills a vessel completely?
  2. Camphor disappears without leaving any residue.

Fig. I Fig. II

In figure-I, an air column of length ℓ1 is entrapped by a column of Hg of length 8 cm. In figure-II length of same air column at the same temperature is ℓ2. The `ℓ_1/ℓ_2` is:
(1 atm = 76 cm of Hg)


A gaseous mixture of He and O2 is found to have a density of 0.518 gL-1 at 25° C and 720 torr. The mass percent of helium in this mixture is ______.


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