CBSE 12th Standard Chemistry Subject Haloalkanes and Haloarenes Ncert Exemplar 2 Mark Questions With Solution 2021
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CBSE 12th Standard Chemistry Subject Haloalkanes and Haloarenes Ncert Exemplar 2 Mark Questions With Solution 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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Which of the compounds will react faster in SN1 reaction with the -OH ion?
CH3-CH2-Cl or C6H5-CH2-Cl -
Why iodoform has appreciable antiseptic property?
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Discuss the role of Lewis acid in the preparation of aryl bromides and chlorides in the dark.
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CBSE 12th Standard Chemistry Subject Haloalkanes and Haloarenes Ncert Exemplar 2 Mark Questions With Solution 2021 Answer Keys
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SN1 reactions occur through carbocation intermediates. C6H5 -CH2CI readily undergoes ionization to give C6HsCH+2 which is stabilized by resonance.
In constant, CH3CH2CI does not undergo ionization to give CH3CH 2+.As a result, C6H5CH2CI reactsfaster than CH3CH2CI with OH- ion. -
The antiseptic property of iodoform is due to liberation of 12 when it comes in contact with skin and not due to iodoform itself.
\(\underset { Iodo\ form }{ { CHI }_{ 3 } } \overset { contact\ with\ skinow }{ \longrightarrow } \underset { Iodine }{ { I }_{ 2 } } (has\ antiseptic\ property)\) -
The role of Lewis acids in the preparation of aryl chlorides and bromides is to generate the electrophiles, i.e., CI+and Br+ from the corresponding halogens
These electrophiles then react with arenes to form the corresponding aryl halides by electrophilic substitution mechanism.
