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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 balanced equations for the following reaction:
Acetaldehyde with hydroxylamine.
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
In the following sequence of the reactions, what is D?
Phosgene is a common name for ____________.
In which of the following conversions, phosphorus pentachloride is used as the reagent?
\[\ce{CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr}\], will be fastest in:
A dihalogen derivative ‘X’ of a hydrocarbon with three carbon atoms react with ale. KOH and produces hydrocarbon which forms red ppt. with ammonical Cu2Cl2. ‘X’ gives an aldehyde on reaction with aq. KOH. The compound ‘X’ is:
Chloromethane on treatment with excess of ammonia yields mainly ______.
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.
How will you obtain monobromobenzene from aniline?
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?
Ethyl chloride is converted into diethyl ether by
Ethyl bromide reacts with lead sodium alloy to from:-
CH3NH2 react with CH3mg x to give
Chloroform on reduction with Zn an HCI (all) gives:-
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 ______.
The major product formed when 1, 1, 1-trichloropropane is treated with aqueous potassium hydroxide, is ______.
Write the equation for the following:
Oxidation of chloroform by air and light.
Give the IUPAC name of the following compound:
\[\ce{(CCl3)3CCl}\]
Convert the following iodomethane to methoxy methane.
Give the uses of carbon tetrachloride.
