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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
Give balanced equations for the following reaction:
Acetaldehyde with hydroxylamine.
Write balanced chemical equation for the following reaction:
Methyl magnesium iodide is treated with carbon dioxide and the product hydrolysed in acidic medium.
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
Write the formula of the following compound:
Potassiumhexacyanoferrate(III)
Give a balanced chemical equation to convert methyl cyanide to ethyl alcohol.
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?
Chloroform and conc. HNO3 reacts to produce ____________.
B.H.C. is used as an ____________.
Chloropicrin is formed by the reaction of ____________.
Major product obtained on reaction of 3-Phenyl propene with HBr in presence of organic peroxide.
Chloromethane on treatment with excess of ammonia yields mainly ______.
Why iodoform has appreciable antiseptic property?
Diphenyls are potential threat to the environment. How are these produced from arylhalides?
How will you obtain monobromobenzene from aniline?
Some halogen containing compounds are useful in daily life. Some compounds of this class are responsible for exposure of flora and fauna to more and more of UV light which causes destruction to a great extent. Name the class of these halocompounds. In your opinion, what should be done to minimise harmful effects of these compounds.
Convert the following:
Chloroethane to methanamine.
Which of the following does not give iodoform test?
The shape of methyl carbanion is similar to that of–
Which of the following will have a mesoisomer also?
If chloroform is left open in air in the presence of sunlight, it gives
Ethyl bromide reacts with lead sodium alloy to from:-
Chlorination of CS2 give
Sodium ethoxide react with ethyl iodide to yield.
CH3NH2 react with CH3mg x to give
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 ______.
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:
\[\ce{CICH2C =CCH2Br}\]
State the uses of iodoform (CHI3)
Write two uses of polyhalogen compounds.
Convert the following iodomethane to methoxy methane.
Give the uses of carbon tetrachloride.
DDT is obtained by the reaction of chlorobenzene with ______.
Methyl bromide is not used ______.
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
