11th Chemistry - Book Back Answers - Unit 14 - English Medium Guides

 

 

Plus One / 11th Chemistry- Book Back Answers - Unit 14 - English Medium

Tamil Nadu Board 11th Standard Chemistry - Unit 14 : Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 14 – Chemistry from the Tamil Nadu State Board 11th Standard Chemistry textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

    We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

    By going through this material, you’ll gain a strong understanding of Chemistry Unit 14 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

• 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following 
• 2 Mark Questions: Answer briefly 
• 3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 11 students! Prepare well and aim for top scores. Thank you!

Unit 14 :Haloalkanes and Haloarenes

I. Choose the best answer.

1. The IUPAC name of

a) 2-Bromo pent – 3 – ene
b) 4-Bromo pent – 2 – ene
c) 2-Bromo pent – 4 – ene
d) 4-Bromo pent – 1 – ene
Answer Key:
b) 4-Bromo pent – 2 – ene
 
2. Of the following compounds, which has the highest boiling point?
a) n-Butyl chloride
b) Isobutyl chloride
c) t-Butyl chloride
d) n-propyl chloride
Answer Key:
a) n-Butyl chloride
 
3. Arrange the following compounds in increasing order of their density
A) CCl₄
B) CHCl₃
C) CH₂Cl₂
D) CH₃Cl
a) D < C < B < A
b) C > B > A > D
c) A < B < C < D
d) C > A > B > D
Answer Key:
a) D < C < B < A
 
4. With respect to the position of – Cl in the compound CH₃ – CH = CH – CH₂ – Cl, it is classified as
a) Vinyl
b) Allyl
c) Secondary
d) Aralkyl
Answer Key:
b) Allyl
 
5. What should be the correct IUPAC name of diethyl chloromethane?
a) 3 – Chloro pentane
b) 1-Chloropentane
c) 1-Chloro-1, 1, diethyl methane
d) 1 –Chloro-1-ethyl propane
Answer Key:
a) 3 – Chloro pentane
 
6. C -X bond is strongest in
a) Chloromethane
b) Iodomethane
c) Bromomethane
d) Fluoromethane
Answer Key:
d) Fluoromethane
 
7. In the reaction  

Answer Key: 

 

8. Which of the following compounds will give racemic mixture on nucleophilic substitution by OH^- ion?

a) (i)
b) (ii) and (iii)
c) (iii)
d) (i) and (ii)
Answer Key:
c) (iii)
 
9. The treatment of ethyl formate with excess of RMgX gives
a) R- $\underset{\mathrm{O}}{\stackrel{\mathrm{C}}{\left|\right|}}$ - R
b) R- $\underset{\mathrm{OH}}{\stackrel{\mathrm{CH}}{|}}$ - R
c) R- CHO
d) R- O – R
Answer Key:
b) R- $\underset{\mathrm{OH}}{\stackrel{\mathrm{CH}}{|}}$ - R
 
10. Benzene reacts with Cl₂ in the presence of FeCl₃ and in absence of sunlight to form
a) Chlorobenzene
b) Benzyl chloride
c) Benzal chloride
d) Benzene hexachloride
Answer Key:
c) Benzal chloride

 
11. The name of C₂F₄Cl₂ is ___________
a) Freon – 112
b) Freon – 113
c) Freon – 114
d) Freon – 115
Answer Key:
c) Freon – 114
 
12. Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene chloride?
a) Zn / methanol
b) KOH / ethanol
c) aqueous KOH
d) ZnCl₂ / Con HCl
Answer Key:
c) aqueous KOH
 
13. Match the compounds given in Column I with suitable items given in
Column II 

Code
a) A → 2 B → 4 C →1 D →3
b) A → 3 B → 2 C →4 D →1
c) A → 1 B → 2 C →3 D →4
d) A → 3 B → 1 C →4 D →2
Answer Key:
d) A → 3 B → 1 C →4 D →2
 
14. Assertion: In mono haloarenes, electrophilic substitution occurs at ortho and para positions.
Reason: Halogen atom is a ring deactivator
(i) If both assertion and reason are true and reason is the correct explanation
of assertion.
(ii) If both assertion and reason are true but reason is not the correct explanation of assertion.
(iii) If assertion is true but reason is false.
(iv) If both assertion and reason are false.
Answer Key:
(ii) If both assertion and reason are true but reason is not the correct explanation of assertion.
 
15. Consider the reaction,
CH₃CH₂CH₂Br + NaCN →
CH₃CH₂CH₂CN + NaBr
This reaction will be the fastest in
a) ethanol
b) methanol
c) DMF (N, N' – dimethyl formamide)
d) water
Answer Key:
c) DMF (N, N' – dimethyl formamide)
 
16. Freon-12 is manufactured from tetrachloro methane by
a) Wurtz reaction
b) Swarts reaction
c) Haloform reaction
d) Gattermann reaction
Answer Key:
b) Swarts reaction
 
17. The most easily hydrolysed molecule under SN¹ condition is
a) allyl chloride
b) ethyl chloride
c) ispropylchloride
d) benzyl chloride
Answer Key:
d) benzyl chloride
 
18. The carbo cation formed in SN¹ reaction of alkyl halide in the slow step is
a) sp³ hybridised
b) sp² hybridised
c) sp hybridised
d) none of these
Answer Key:
b) sp² hybridised
 
19. The major products obtained when chlorobenzene is nitrated with HNO₃ and con H₂SO₄
a) 1-chloro-4-nitrobenzene
b) 1-chloro-2-nitrobenzene
c) 1-chloro-3-nitrobenzene
d) 1-chloro-1-nitrobenzene
Answer Key:
a) 1-chloro-4-nitrobenzene
 
20. Which one of the following is most reactive towards nucleophilic substitution reaction ? 

Answer Key:

21. Ethylidene chloride on treatment with aqueous KOH gives

a) acetaldehyde
b) ehtyleneglycol
c) formaldehyde
d) glycoxal
Answer Key:
a) acetaldehyde
 
22. The raw material for Rasching process
a) chloro benzene
b) phenol
c) benzene
d) anisole
Answer Key:
c) benzene
 
23. Chloroform reacts with nitric acid to produce
a) nitro toluene
b) nitro glycerine
c) chloropicrin
d) chloropicric acid
Answer Key:
c) chloropicrin
 
24. acetone $\underset{ \mathrm{ii}) {\mathrm{H}}_2\mathrm{O} / \mathrm{H}\mathrm{–}1}{\overset{\mathrm{i}) {\mathrm{CH}}_3\mathrm{MgI}}{\to }}$   X, X is
a) 2-propanol
b) 2-methyl-2-propanol
c) 1-propanol
d) acetonol
Answer Key:
b) 2-methyl-2-propanol
 
25. Silverpropionate when refluxed with Bromine in carbontetrachloride gives
a) propionic acid
b) chloro ethane
c) bromo ethane
d) chloro propane
Answer Key:
c) bromo ethane
 

II. Short Answer Questions

11th Chemistry

III. Long Answer Questions

11th Chemistry

IV. Exercise

11th Chemistry