CBSE Class 12 Chemistry Haloarenes Worksheet

CBSE Class 12 Chemistry Worksheet - Haloarenes. CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

HALOARENES

1.Give IUPAC names of the following:- 

(a) Iso-butylchloride

(b) tert- butylchloride

(c) neo-pentylbromide

(d) ethylidene chloride

(e) Ethylene dichloride

(f) ethylene dichloride

(g) bromoform

(h) vinylchloride

(i) allyl bromide

(j) methylene chloride

(k) benzyl chloride

2.Give reasons for the following:-

(a) Flourine is more electronegative than chlorine still dipolemoment of C-F bond is less than that of CCl bond in methylflouride & methylchloride.

(b) For the conversion of alcohols to alkyl halides, thionyl chloride is preferred over phosphorous halide or halogen acid.

(c) Conversion of alcohols to alkyl iodide is done in absence of catalyst zinc chloride.

(d) Phenol cannot be converted to halobenzene by reaction with thionyl chloride or phosphorous halide or halogen acid.

(e) Free radical halogenation of alkanes is not a very good method for preparation of holoalkanes.

(f) Electrophilic substitution of benzene with iodine requires presence of oxidizing agents like HIO3.

(g) Electrophilic substitution of benzene with fluorine is not done for preparation of flourobenzene.

(h) Finkelstein reaction is carried out in dry acetone medium.

(i) Rate of reaction between t-butyl bromide & hydroxide ion depends only on concentration of hydroxide ions.

(j) Allylic & benzylic halides show high reactivity towards SN1 reaction.

(k) Dehydrohalogenation of 2-bromopentane gives 2-pentene as the major product.

(l) Optically active 2-bromobutane on treatment with aq KOH results in formation of optically inactive product.

(m) Aryl halides are extremely less reactive towards nucleophilic substitution reactions.

(n) Rate of electrophilic substitution reactions in haloarenes is less than that of benzene.

(o) Choloform is stored in dark bottles.

(p) P-Nitrochlorobenzene can be more easily hydrolysed with aq. NaOH thatn chlorobenzene.

(q) Reaction of (-) 2-Bromo octane with aq NaOH results in formation of (+)octane-2-ol.

Please click the link below to download full pdf file for CBSE Class 12 Chemistry Worksheet - Haloarenes.

Tags: 

 


Click to View or Download pdf file
Click for more Chemistry Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Board Exams Class 10 and 12 Notification by CBSE

Because of the prevailing condition of spread of COVID-19 pandemic in the country, special efforts are required for conducting examinations in a safe manner. As a number of students have shifted from the district of their school to some other district in the country,...

Re verification of Class 10 Board Exams Marks

Modalities and Schedule for Secondary School (Class X) Examinations, 2020 in the subjects whose examinations have been conducted by CBSE for the processes of (I) Verification of Marks (II) Obtaining Photocopy of the Evaluated Answer Book(s) (Ill) Re-evaluation of Marks...

CBSE Decision on Board Exam 2020

The Class 10 and 12 exams are cancelled, and results for both 10th and 12th would be declared by July 15 based on internal exams. CBSE Class 12 students would have the option to appear for the exams at a later date. CBSE has a scheme in which marks scored in past 3...

Board Exams helpline by CBSE

According to the recent announcement of CBSE, the pending Class 10 and 12 Board exams are going to be held from 01 July to 15 July 2020 in India. Along with this, it has also been decided to resume the free of cost tele-counseling service for students from 9.30 am to 5...

Re verification of Class 12 Board Exams Marks

Modalities and Schedule for Senior Secondary School (Class XII) Examinations, 2020 in the subjects whose examinations have been conducted by CBSE for the processes of (I) Verification of Marks (II) Obtaining Photocopy of the Evaluated Answer Book(s) (Ill) Re-evaluation...

×
Studies Today