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प्रश्न
Write the environmental effects of DDT.
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उत्तर
- It is not completely biodegradable i.e. it is not very rapidly metabolized by animals. Instead, it gets deposited and store in fatty tissues. It is exists for longtime in soil, plants and animals as well. It produces unforeseen ecological effects.
- It is replaced by better and safer insecticide due to ecological problems.
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संबंधित प्रश्न
Draw structure of DDT.
How can the following conversions be brought about:
Methyl chloride to acetone.
Give balanced equations for the following reactions:
Acetic anhydride with phosphorus pentachloride.
Write balanced chemical equation for the following reaction:
Methyl magnesium iodide is treated with carbon dioxide and the product hydrolysed in acidic medium.
In the following sequence of the reactions, what is D?
The pesticide DDT slowly changes to __________.
Phosgene is a common name for ____________.
In which of the following conversions, phosphorus pentachloride is used as the reagent?
B.H.C. is used as an ____________.
Gammexane is ____________.
Chloropicrin is formed by the reaction of ____________.
Fitting reaction can be used to prepare ____________.
\[\ce{CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr}\], will be fastest in:
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?
How can you obtain iodoethane from ethanol when no other iodine-containing reagent except NaI is available in the laboratory?
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 |
Assertion: It is difficult to replace chlorine by –OH in chlorobenzene in comparison to that in chloroethane.
Reason: Chlorine-carbon \[\ce{(C - Cl)}\] bond in chlorobenzene has a partial double bond character due to resonance.
The most stable conformation of 1, 2-dibromomethane among the following is
 |
| I |
 |
| II |
 |
| III |
 |
| IV |
Which of the following does not give iodoform test?
Which of the following will have a mesoisomer also?
Chlorination of CS2 give
CH3NH2 react with CH3mg x to give
Westrosol is:-
In the above reaction if we take methylene chloride and isopropylidene chloride then products are ______.
The compound that will not give iodoform on treatment with alkali and iodine is ______.
Phenyl magnesium bromide reacts with methanol to give ______.
Which among the following pairs has only herbicides?
Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as ______.
Give the IUPAC name of the following compound:
\[\ce{(CCl3)3CCl}\]
Give the IUPAC names of the following componus:
\[\ce{CICH2C =CCH2Br}\]
Write names of two polyhalogen compounds.
Write two uses of polyhalogen compounds.
Convert the following iodomethane to methoxy methane.
Write equation to convert Methyl cyanide to ethanoic acid.
Give the uses of DDT.
Give the uses of iodoform.
DDT is obtained by the reaction of chlorobenzene with ______.
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In the light of above statements, choose the most appropriate answer from the options given below
Which of these compounds is synthesised by chloral?
