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प्रश्न
Diphenyls are potential threat to the environment. How are these produced from arylhalides?
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उत्तर
Diphenyl such as p,p ‘-dichlorodiphenyl trichloroethane (DDT) are posing serious environment problems because of its chemical stability and its fat solubility. Its residue accumulates in environment and its long-term effects could be highly dangerous.
Diphenyl can be prepared from aryl halides by the following two methods:
(i) Fittig reaction
(ii) Ullmann biaryl synthesis
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संबंधित प्रश्न
Write the environmental effects of DDT.
Give balanced equations for the following reaction:
Acetaldehyde with hydroxylamine.
Write the formula of the following compound:
Potassiumhexacyanoferrate(III)
In the following sequence of the reactions, what is D?
The pesticide DDT slowly changes to __________.
Fitting reaction can be used to prepare ____________.
Why iodoform has appreciable antiseptic property?
Name the alkene which will yield 1-chloro-1-methylcyclohexane by its reaction with \[\ce{HCl}\]. Write the reactions involved.
What are the IUPAC names of the insecticide DDT and benzene hexachloride? Why is their use banned in India and other countries?
Match the compounds given in Column I with the effects given in Column II.
| Column I | Column II | |
| (i) | Chloramphenicol | (a) Malaria |
| (ii) | Thyroxine | (b) Anaesthetic |
| (iii) | Chloroquine | (c) Typhoid fever |
| (iv) | Chloroform | (d) Goiter |
| (e) Blood substituent |
CH3NH2 react with CH3mg x to give
Chloroform on reduction with Zn an HCI (all) gives:-
Westrosol is:-
Give the IUPAC names of the following componus:
\[\ce{CICH2C =CCH2Br}\]
Give the uses of DDT.
Give the uses of carbon tetrachloride.
Give the uses of iodoform.
Strong reducing agent converts CHCl3 into:
Assertion (A): Exposure of ultraviolet rays to human causes the skin cancer, disorder and disrupt the immune system. Sol. Reason (R): Carbon tetrachloride is released into air it rises to atmosphere and deplets the ozone layer. In the light of above statements, choose the most appropriate answer from the options given below.
Assertion (A): CHCI3 is stored in dark bottles. Reason (R): CHCl3 is oxidised in dark.
In the light of above statements, choose the most appropriate answer from the options given below
