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CBSE Class 12 Chemistry Haloalkane Haloarenes Exam Notes. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.
Ans. (a) & (c) With four different alkyl group.
Q4.Although chlorine is an EWG yet it is ortho-para directing in electro plilic aromatic substitution Rx.
Ans.Chlorine shows –– I effect causing the intermediate carbocation will destabilize but +R effect of Cl stabilizes the intermediate carbocation. The reactivity is controlled by the stronger – I effect while orientation is controlled by weaker reasoned effect.
Q5.Haloalkanes react with KCN to form RCN but with AgCN form RNC?
Ans.CN is an ambidient group (can be attached from both the ends). In KCN, it is ionic bond, the reaction occuss through C since C – C bonds are more stronger while in AgCN (covelent bonding), only N electron pair is available for bond formation.
Q6.RCl is hydrolysed to ROH slowly but the reaction is rapid if a catalytic amount of KI is added to the reaction mixture.
Ans.I– is stronger nucleoplile so it replace Cl to form RI then RI is more hydrolysed to yield ROH due to I–ion is a better leaving group than Cl–.
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CBSE Class 12 Chemistry Study Material: Unit 6 Haloalkanes and Haloarenes
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Our advanced study package for Unit 6 Haloalkanes and Haloarenes includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 12 students learn as per syllabus for 2026 exams.
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Yes, teachers use our Class 12 Chemistry resources for lesson planning as they are in simple language and have lot of solved examples.
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Yes, our subject matter experts have updated the Unit 6 Haloalkanes and Haloarenes material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.