Home
Class 9
CHEMISTRY
Give reasons for the following observati...

Give reasons for the following observations
(a) The smell of lighted incense stick spreads several metres away.
(b) A liquid has a fixed volume but not a fixed shape.
(c ) Ice floats over water.

Text Solution

Verified by Experts

(a) This happens because of diffusion.
Promotional Banner

Topper's Solved these Questions

  • MATTER IN OUR SURROUNDINGS

    DINESH PUBLICATION|Exercise Higher Order Thinking Skill|4 Videos

  • MATTER IN OUR SURROUNDINGS

    DINESH PUBLICATION|Exercise Test Your Knowledge|42 Videos

  • MATTER IN OUR SURROUNDINGS

    DINESH PUBLICATION|Exercise Short Answer Questions|41 Videos

  • IS MATTER AROUND US PURE

    DINESH PUBLICATION|Exercise LAQs|10 Videos

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Long Answer Questions|6 Videos

Similar Questions

Explore conceptually related problems

Give reasons for the following observations (a) The smell of lighted incrense stick spreads several metres away. (b) A liquid has a fixed volume but not a fixed shape. (c ) Ice floats over water. (d) A wooden table is called a solid at room temperature.

Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away. But to get the smell from cold food you have to go close.

Give reasons for the following observations : (a) A deal is formed at the meeting point of sea water and river water. (b) NH_(3) gas adsorbs more readily than N_(2) gas on the surface of charcoal. (c ) Powdered substances are more effective adsorbents.

Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c ) Use of synthetic detergents causes pollution of water.

Write a suitable terms for the following description. (a) The fragrance of incense stick spreads in the entire space enclosed. (b) A gas in a larger cylinder can be transferred into a smaller cylinder. (C) Naphthalene balls reduce in size on long standing. (d) Ethyl alcohol on heating starts vaporizing at 78^(@)C . (e) Liquids and gase can spread to larger distances.

Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away.

Give reasons for the following : (a) A liquid generally flows easily. (b) Ice at 0^(@)C appears colder in the mouth than water at 0^(@)C . (c ) Doctors advise to put strips of wet cloth on the forehead of a person having high fever.

Give reasons for the following (a) C Cl_(4) is immiscible in water, whereas SiCl_(4) is easily hydrolysed. (b) Carbon has a strong tendency for catenation compared to silicon.