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The extensive use of CFCs as refrigents ...

The extensive use of `CFCs` as refrigents fluids and in aerosol is because of :

A

Its high chemical stability

B

Good absorber of UV radiation

C

Its polar nature

D

High toxicity

Text Solution

Verified by Experts

The correct Answer is:
A
CFC.s are chemically most stable, colourless, adourless and harmless gases
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Freons, i.e., chlorofluorocarbons (CFC) have been widely used as refrigerants and as propellants in aerosols and foams. But theiir persistent use has depleted the ozone layer which has led to global warming. Consequently, use of freons as refrigerants and propellants in aerosols has beenn banned in USA and many other countries. during the past few years, search for effective substitutues for freons have been successful. Now answer the following questions: (i). What is freon-12? How is it prepared? (ii) How does freon-12 deplete ozone layer?

Why is excessive use of CFCs a cause of concern ?

Knowledge Check

  • File extension is used

    A
    For naming the file
    B
    To ascertain that file name is not lost
    C
    To identify file
    D
    To identify file type

  • Assertion : Extensive use of CFCs increases the chances of skin cancer. Reason : CFCs deplete the ozone layer in stratosphere.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • The compounds used as refrigent are

    A
    `NH_(3)`
    B
    `C Cl_(4)` is non-inflammable
    C
    `CF_(4)`
    D
    `CF_(2)Cl_(2)`

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