Advertisements
Advertisements
Question
Write the environmental effects of DDT.
Advertisements
Solution
- 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.
APPEARS IN
RELATED QUESTIONS
How the following conversion can be carried out?
Isopropyl alcohol to iodoform
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.
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
Phosgene is a common name for ____________.
B.H.C. is used as an ____________.
Gammexane is ____________.
Among the following, insecticide is:
Fitting reaction can be used to prepare ____________.
\[\ce{CH3CH2CH2Br + NaCN -> CH3CH2CH2CN + NaBr}\], will be fastest in:
Major product obtained on reaction of 3-Phenyl propene with HBr in presence of organic peroxide.
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?
How will you obtain monobromobenzene from aniline?
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 |
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.
The shape of methyl carbanion is similar to that of–
If chloroform is left open in air in the presence of sunlight, it gives
Ethyl chloride is converted into diethyl ether by
Chlorination of CS2 give
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 ______.
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 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 carbon tetrachloride.
Give the uses of iodoform.
DDT is obtained by the reaction of chlorobenzene with ______.
Strong reducing agent converts CHCl3 into:
Which of these compounds is synthesised by chloral?
Iodoform can be prepared from all except:
