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A bottle of perfume was opened in a room...

A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.

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The correct Answer is:
Diffusion
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If we open a bottle of perfume, its smell spreads in the entire room with in a short time due to the process of

When a bottle of perfume is opened, odorous molecules mix with air and slowly diffuse throughout the entire room. Which is not correct for this process?

(a) When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance quickly spreads in the entire room. Name the process involved in this. (b) A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.

List three characteristics of particles of matter. Describe one example for example for each characteristic to illustrate it. Name the characteristics which are responsible for (a) spreading of smell of scent in a room and (b) water taking the shape of the vessel in which it is poured.

The constant motion and high velocities of gas particles lead to some important practical consquences. One such consquences is that gases mix rapidly when they come in contact. Take the stopper off a bottle of perfume, for instance, and the odour will spread rapidly through the room as perfume molecules mix with the molecules in the air. This mixing of different gases by random molecular motion and with frequent collision is called diffusion. A similar process in which gas molecules escape without collision through a tiny hole into a vacuum is called effusion. Both the processes follow Graham's law which is mathematically put as r prop sqrt(1//d) . The average distance travelled by molecules between successive collisions is called mean free path. Answer the following questions on the basis of the above information: X mL H_(2) effuses through a hole in a container in 5 s . The time taken for the effusion of the same volume of the gas specified below under identical conditions is

The constant motion and high velocities of gas particles lead to some important practical consquences. One such consquences is that gases mix rapidly when they come in contact. Take the stopper off a bottle of perfume, for instance, and the odour will spread rapidly through the room as perfume molecules mix with the molecules in the air. This mixing of different gases by random molecular motion and with frequent collision is called diffusion. A similar process in which gas molecules escape without collision through a tiny hole into a vacuum is called effusion. Both the processes follow Graham's law which is mathematically put as r prop sqrt(1//d) . The average distance travelled by molecules between successive collisions is called mean free path. Answer the following questions on the basis of the above information: Select the incorrect statement(s).

The constant motion and high velocities of gas particles lead to some important practical consquences. One such consquences is that gases mix rapidly when they come in contact. Take the stopper off a bottle of perfume, for instance, and the odour will spread rapidly through the room as perfume molecules mix with the molecules in the air. This mixing of different gases by random molecular motion and with frequent collision is called diffusion. A similar process in which gas molecules escape without collision through a tiny hole into a vacuum is called effusion. Both the processes follow Graham's law which is mathematically put as r prop sqrt(1//d) . The average distance travelled by molecules between successive collisions is called mean free path. Answer the following questions on the basis of the above information: Select the correct statement(s).

LAKHMIR SINGH & MANJIT KAUR-MATTER IN OUR SURROUNDINGS -NCERT
  1. A bottle of perfume was opened in a room. The smell of its vapours spr...

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  2. Which of the following are matter? Chair, air,love, smell, hate, atmon...

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  3. Give reasons for the following observation: The smell of hot sizzling ...

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  4. A diver is able to cut through water in a swimming pool. Which propert...

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  5. CHARACTERISTICS OF PARTICLES OF MATTER

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  6. The mass per unit volume of a substance is called density (density = m...

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  7. (a) Tabulate the differences in the characteristics of states of matte...

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  8. Give reasons (a) A gas fills completely the vessel in which it is ke...

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  9. Liquids generally have lower density as compared to solids but you mus...

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  10. Convert the following temperatures to celsius scale : (a) 300 K (...

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  11. What is the physical state of water at: a. 250^(@)C b. 100^(@)C ?

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  12. For any substance, why does the temperture remain constant during the ...

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  13. Suggest a method to liquefy atmospheric gases.

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  14. Why does a desert cooler cool better on a hot dry day?

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  15. How does the water kept in an earthen pot (mataka) become cool during ...

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  16. Why does our palm feel cold when we put some acetone or petror or per...

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  17. Why are we able to sip hot tea or milk faster from a saucer rather tha...

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  18. What type of clothes should we wear in summer?

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  19. Convert the following temperatures to the celsius scale. (a) 293k (...

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  20. Convert the folowing temperature to the kelvin scale. (a) 25^(@)C (b...

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  21. Give reason for the following observations. (a) Naphthalene balls d...

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