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CBSE Class 10 Answered

giving reasons explain how ACs and refrigerators are causing harm to environment (2 marks)
Asked by Sakshi | 12 Mar, 2014, 08:39: PM
answered-by-expert Expert Answer
(i)Air conditioners and refrigerators involves chlorofluorocarbons(CFC) during either manufacture or use.These chemicals damage the earth's protective ozone layer.
(ii)Using refrigerators and air conditioners in our homes has increased the chances of moisture forming on interior surfaces. This encourages the growth of certain biological pollutants.
Answered by | 13 Mar, 2014, 09:06: AM

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CBSE 10 - Biology
(A)Assertion : aquarium needs to be cleaned regularly (R)Reason : In an aquarium there is no microbes to clean the water.   a) both A and R are true and R is correct explaination for A.  b) both A and R are true but R notthe correct explanation of c)  A is true R is false d) A is false R is true         
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CBSE 10 - Biology
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CBSE 10 - Biology
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CBSE 10 - Biology
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CBSE 10 - Biology
What are trophic levels Give example of food chain state the different tropic levels.  
Asked by chinmaypatil34.10tpstl | 22 Dec, 2020, 10:37: AM
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CBSE 10 - Biology
If the following food chain 5 J of energy is available to man, How much energy was available at producer level?   Plant --------> Sheep --------->Man
Asked by gourikori21 | 09 Dec, 2020, 03:12: PM
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CBSE 10 - Biology
Why is damage to ozone layer is a cause of concern? Why steps are  being taken to limit this damage?
Asked by saketarnav2005 | 29 Oct, 2020, 09:23: AM
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CBSE 10 - Biology
how will the unutilized energy of an organism be released in the air?
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Asked by acshanadhana15 | 17 Sep, 2020, 12:05: PM
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