Q34 / 160 · TS EAMCET 2021 (06 Aug Shift 2) · Chemistry
Match the following.
The correct match is
$\text { A } \quad B \quad C$
The correct match is $\text { A } \quad B \quad C$
- AII I IV
- Correct answerBIII IV IV
- CIII I I
- DII IV I
Solution
(A) Addition of HI takes place by the formation of $1^{\circ}$ and $2^{\circ}$ carbonium ion. $2^{\circ}$ carbonium ion being more stable will form major product, i.e. 2-iodopropane.
(B) The reaction of bromine with 1-phenylethane proceed with formation of free radical. $2^{\circ}$ free radical being more stable than $1^{\circ}$ free radical, will form the product as 1-bromo-1-phenylethane.
(C) Reaction of $\mathrm{HBr}$ to an alkene follows Markownikoff rule. So, the product will be 1-bromo-1-phenylethane.
Note : Markownikoff's rule states that, electron rich component adds to carbon atom with less number of hydrogen atoms. Hence, the correct match is A-III, B-IV, C-IV. The reactions are :
(B) The reaction of bromine with 1-phenylethane proceed with formation of free radical. $2^{\circ}$ free radical being more stable than $1^{\circ}$ free radical, will form the product as 1-bromo-1-phenylethane.
(C) Reaction of $\mathrm{HBr}$ to an alkene follows Markownikoff rule. So, the product will be 1-bromo-1-phenylethane.
Note : Markownikoff's rule states that, electron rich component adds to carbon atom with less number of hydrogen atoms. Hence, the correct match is A-III, B-IV, C-IV. The reactions are :
Hence, the correct answer is option: 'B'.