CBSE Class 12 Chemistry Halo Alkanes And Haloarene Worksheet Set B

CBSE Class 12 Chemistry Halo alkanes and Haloarene (1). 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.

1 MARK QUESTIONS

1. What happens when tert-butyl alcohol is treated with Cu / at 573 K.?

2. Arrange the following halides in order of increasing SN² reactivity :

CH3 — Cl, CH3 — Br, CH3CH2Cl, (CH3)2 CHCl

3. Alkyl halides, though polar, are immiscible with water. Why?

4. Grignard reagents should be prepared under anhydrous conditions. Why?

5. Which of the following two compounds would react faster by SN² pathway: 1-bromobutane (OR) 2-bromobutane.

6. Allyl Chloride is more reactive than n-propyl Chloride towards nucleophilic substitution reactions. Explain.

7. Explain why is Chlorobenzene difficult to hydrolyse than ethyl chloride ?

8. R—Cl is hydrolysed to R—OH slowly but the reaction is rapid if a catalytic amount of KI is added to the reaction mixture.Why?

9. Why haloalkanes are more reactive than haloarenes.

10. Why do haloalkenes undergo nucleophillic substitution whereas haloarenes under go electophillic substitution?

11. Aryl halides cannot be prepared by the action of sodium halide in the presence H2SO4 .Why?

12. Why is Sulphuric acid not used during the reaction of alcohols with KI ?

13. p- dichlorobenzene has highest m.p. than those of ortho and m-isomers.?

14. Although chlorine is an electron- withdrawing group, yet it is ortho and para directing in electrophillic aromatic substitution reactions.Why?

15. Explain why vinyl chloride is unreactive in nucleophillic substitution reaction? 

Please click the link below to download full pdf file for CBSE Class 12 Chemistry Halo alkanes and Haloarene (1).

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

CBSE advisory on student marks

CBSE has issued a public advisory for all students to be careful from unscrupulous persons impersonating themselves as officers/officials of CBSE. These people have been contacting parents and have been telling them that they have access to student marks data for Board...

Procedure for correction in Name and Date of Birth

Procedure for correction in Name and Date of Birth in CBSE records Name Change: Applications regarding changes in name or surname of candidates will be considered provided the changes have been admitted by the Court of law and notified in the Government Gazette before...

Class 10 Datesheet announced

CBSE has announced the date sheet for the remaining class 10 Board Exams, see dates below

CBSE Boards Paper Checking to Start

As per the announcement recently released by the Ministry of Home Affairs, at least 3000 CBSE affiliated selected as evaluation centers for board exam answer sheets will be allowed to open for the limited purpose of evaluation purposes only. The answer sheets for Board...

Board Exams Class 10 and Class 12 Datesheet 2020

CBSE has announced the datesheet for the remaining exams of class 10 and class 12 exams. The exams are going to start in July. The class 10 and 12th board exams will be conducted for the remaining 29 papers from July 1 to July 15, 2020, at various centers nominated by...

CBSE Online Training for Teachers 2020

It is clear that this pandemic has utterly disrupted an education system that many assert was already losing its relevance. Enhancing professional development digitally is a need in the times of COVID-19, where social distancing and remote interactions is the new...

×
Studies Today