Multiple Choice QuestionsIodoform gives a precipitate with AgNO3 on heating but chloroform does not because
C - I bond in iodoform is weak and C - Cl bond in chloroform is strong
chloroform is covalent
iodoform is ionic
None of the above
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?
Benzyl chloride
Ethyl chloride
Chlorobenzene
lsopropyl chloride
A.
Benzyl chloride
Among all the given options, benzyl chloride undergoes SN1 mechanism.
Aliphatic SN1 reaction is carried out in two steps:
(i) carbonium (carbocation) ion is formed and its formation is based upon the stability.
Stability order of carbocation-
C6H52H2 > CH3 - H - CH3 > CH3 - H2
(ii) Nucleophile is attracted towards the carbonium ion in form of fast step to give final product.
Hence, in benzyl chloride, ethyl chloride and isopropyl chloride order of SN 1 reaction is benzyl chloride > isopropyl chloride > ethyl chloride
Which of the following organic halogen compounds undergoes hydrolysis with aqueous NaOH predominantly by Sy1 mechanism?
Ethyl iodide
Methyl chloride
lsopropyl chloride
Benzyl chloride
Under basic condition which one suffers elimination the most?
(CH3)3CCI
(CH3)2CHCH2CI
CH3CH2CHCICH3
CH3CH2CH2CH2CI
What happens if CCl4 is treated with AgNO3 ?
A white ppt. of AgCl will form
NO2 will be evolved
CCl4 will dissolve in AgNO3
Nothing will happen
An asymmetric carbon atom is which
attached three atoms or groups are different
attached all the atoms or groups are different
attached two atoms or groups are different
attached all the atoms or groups are the same
Which of the following isomeric heptanes can yield seven different monochlorinated products upon free radical chlorination?
3-methyl hexane
2, 2-dimethyl pentane
2-methyl hexane
2, 3-dimethyl pentane
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