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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

What Are Molecules ?

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प्रश्न

What are molecules ?

एक पंक्ति में उत्तर
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उत्तर

Molecules are made of atoms. Molecules exhibit the properties of that kind of matter and has independent exi stance.

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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 7

संबंधित प्रश्न

The inter-molecular space is maximum in


Solids have definite shape and definite volume. 


Give one difference between atoms and molecules.


What is meant by saying that non-metals are brittle ?


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


Which of the following does not have a fixed melting point/boiling point ?


There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.

  1. What could the group of materials P be ?
  2. Name the substances Q. Give two examples of such substances.
  3. Name the substances R. Write two examples of such substances.
  4. Name the substances S. Give two examples of such substances.
  5. Out of Q, R and S, which substances are malleable and ductile ?

Which of the two will scatter light : soap solution or sugar solution ? Why ?


Choose the correct answer.

A 5 per cent sugar solution means that :


Classify the following into true solutions and colloidal solutions:

Ink, Salt solution, Starch solution, Blood, Sugar solution


Which of the following can be called a suspension ?


What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?


What is fractional distillation ? What is the use of fractionating column in fractional distillation ?


In Aerosol the dispersed phase is liquid and the dispersion medium is gas.


Liquids cannot be compressed and they have fixed volume.


The physical state of water at 373 K is ______.


Evaporation is always accompanied by ______ in temperature. 


Define the term matter.


Define the term matter.


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