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  Here, I'm sharing with you short notes of Chapter 10 Haloalkanes & Haloarenes of Class 12th, this are last minute revision notes for Board exams...

  Question 1. The most reactive nucleophile among the following is (a) CH 3 O – (b) C 6 H 5 O – (c) (CH 3 ) 2 CHO – (d) (CH 3 ) 3  CO – Answer Answer: (a) CH 3 O – Question 2. CH 3 CH 2 CHCl CH 3  obtained by chlorination of n-butane, will be (a) meso-form (b) racemic mixture (c) d-form (d) 1-form Answer Answer: (b) racemic mixture Question 3. In Friedel-Crafts synthesis of toluene, reactants in addition to anhydrous AlCl 3  are: (a) C 6 H 6  + CH 4 (b) C 6 H 6  + CH 3 Cl (c) C 5 H 5 Cl + CH 3 Cl (d) C 6 H 5/sub>Cl + CH 4 Answer Answer: (b) C 6 H 6  + CH 3 Cl Question 4. S N 1 reaction of alkyl halides leads to (a) retention of configuration (b) racemisation (c) inversion of configuration (d) none of these. Answer Answer: (b) racemisation Question 5. Nucleophilieity order is correctly represented by  Answer Answer: (c) Question 6. Which of the following are arranged in the decreasing order of dipole moment? (a) CH 3 Cl, CH 3 Br, CH 2 F (b) C

  Notes of all the Chapters of Classes 11th and 12th are also available here....👇 Classes 11th & 12th Handwritten Note

 The replacement of hydrogen atom(s) in an aliphatic or aromatic hydrocarbon by halogen atom(s) results in the formation of alkyl halide (haloalkane) and arylhalide (haloarene), respectively. Haloalkanes contain halogen atom(s) attached to the sp3 hybridised carbon atom of an alkyl group whereas haloarenes contain halogen atom(s) attached to sp2 hybridised carbon atom(s) of an aryl group.