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How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew

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Answer the following questions : In the case of image formation by a concave lens, what you can say about the position , nature and size of the image relative to the size of the object ?

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Take an empty can. Pour small quantity of water in it. Boil this water for a few minutes until the steam has driven out most of the air. Now close the can with the stopper tightly. Allow it to cool by pouring cold water over it. What do you observe ?

Apparatus: Evaporating dish, Bunsen burner, etc. Chemicals: Sugar Procedure: Take some sugar in an evaporating dish and heat it with the help of a Bunsen burner. After some time you will see the formation of a burnt out black substance. Exactly what must have happened in this activity?

The coutries which do not have oil reservatirs in their land import oil from other countries. But sometimes during transporting oil through sea routes, accidental oil spilling occurs. This oil spilled in the ocean may prove fatal and toxic to aquatic animals. Therefore, removel of this spilled oil is essential for protection of aquatic life. For removing this oil layer, certain microbes like Pseudomonas spp. and Alcanivarax borkumensis are used. These microbes have the ability to destroy the pyridines and other toxic chemicals. The hydrocarbonoclastic bacteria (HCB) are able to decompose the hydrocarbons and bring about the reaction carbon with oxygen resulting in formation of CO_(2) and water. Like oil spills cause damage to aquatic life, platic forms the major part of the grabage on land. Plastics are difficult to degrade as they are made up of PET. By research, various species like Vibrio and Idenoella sakaiensis which can degred PET.By research, various species like Vibrio and Ideonella sakaiensis which can degrade PET have been identified. There are cartain species of microbes which can decompose rubber from garbage. Based on the given paragraph answer the following question. How are aquatic organisms affected by oil spills in oceans ?

BAL BHARTI-HEAT -Exercise
  1. Fill in the blanks and rewrite the sentence. During transformation o...

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  2. Observe the following graph. Considering the change in volume of water...

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  3. What is meant by specific heat capacity? How will you prove experiment...

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  4. While deciding the unit for heat,which temperatures interval is chosen...

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  5. Explain the following temperature versus time graph.

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  6. Answer the following questions : Explain the role of anomalous behavi...

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  7. How can you relate the formation of water droplets on the outer surfac...

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  8. Explain the following: In cold regions in winter, the rocks crack du...

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  9. Answer the following questions : What is meant by latent heat ? How ...

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  10. Which principle is used to measure the specific heat capacity of a sub...

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  11. Explain the Role of Latent heat in the change of state of a substance

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  12. On what basis and how will you determine whether air is saturated with...

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  13. Read the following paragraph and answer the questions: If heat is exc...

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  14. Read the following paragraph and answer the questions: If heat is exc...

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  15. Read the following paragraph and answer the questions: If heat is exc...

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  16. Read the following paragraph and answer the questions: If heat is exc...

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  17. Equal heat is given to two objects A and B of mass 1 g. temperature of...

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  18. Liquid ammonia is used in ice factory for making ice from water. If w...

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  19. A Thermally Insulated Pot Has 150 G Ice at Temperature 0°C. How Much S...

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  20. A calorimeter has mass 100 g and specific heat 0.1 kcal//kg^@C.It cont...

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