मराठी

Name a Metal Which is Yellow in Colour.

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प्रश्न

Name a metal which is yellow in colour.

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उत्तर

Gold is yellow in colour.

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पाठ 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ ५८]

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लखमीर सिंह Chemistry [English] Class 9
पाठ 2 Is Matter Around Us Pure
Very Short Answers | Q 49.5 | पृष्ठ ५८

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

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 Match the following

Column A Column B
(a) Molecules (i) Water boils
(b) 100° C (ii) Evaporation
(c) 0° C (iii) Changes from solid to gas
(d) At all temperatures (iv) Matter
(e) Camphor (v) Water freezes

Liquids have definite volume but do not have definite shape.


Differentiate between an atom and a molecule.


What is the scientific name of particles which make up mater?


Explain why steel is used to make railway lines.


Name a metal which can be easily cut with a knife.


What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.


In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :

Hydrogen, Oxygen, Steam, Chlorine


There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.

  1. What type of substance could X be ? Name one substance like X.
  2. What type of substance could Y be ? Name one substance like Y.
  3. What type of substance could Z be ? Name one substance like Z.
  4. Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
  5. Name the three groups into which all the substances like Y are divided on the basis of their properties.

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A colloid is a ..............mixture and its components can be separated by the technique known as ...............


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


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A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
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process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.

  1. What could P, Q, R and S be ?
  2. How would you separate a mixture containing P, Q, R and S ?

Diffentiate between absorption and adsorption.


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


Solids possess very high kinetic energy.


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