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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.
Give the uses of freon 12.
How the following conversion can be carried out?
Isopropyl alcohol to iodoform
How the following conversion can be carried out?
Aniline to phenylisocyanide
Give balanced equations for the following reactions:
Acetic anhydride with phosphorus pentachloride.
Give balanced equations for the following reaction:
Acetaldehyde with hydroxylamine.
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
Write the formula of the following compound:
Potassiumhexacyanoferrate(III)
The pesticide DDT slowly changes to __________.
In which of the following conversions, phosphorus pentachloride is used as the reagent?
B.H.C. is used as an ____________.
Among the following, insecticide is:
\[\ce{CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr}\], 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.
Diphenyls are potential threat to the environment. How are these produced from arylhalides?
What are the IUPAC names of the insecticide DDT and benzene hexachloride? Why is their use banned in India and other countries?
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?
Ethyl chloride is converted into diethyl ether by
Chlorination of CS2 give
Sodium ethoxide react with ethyl iodide to yield.
Westrosol is:-
In the above reaction if we take methylene chloride and isopropylidene chloride then products are ______.
Phenyl magnesium bromide reacts with methanol to give ______.
Which among the following pairs has only herbicides?
The major product formed when 1, 1, 1-trichloropropane is treated with aqueous potassium hydroxide, is ______.
Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as ______.
Write the equation for the following:
Oxidation of chloroform by air and light.
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.
Give the uses of DDT.
Give the uses of carbon tetrachloride.
Give the uses of iodoform.
Methyl bromide is not used ______.
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
Which of these compounds is synthesised by chloral?
Iodoform can be prepared from all except:
