NIOS Class 12 Chemistry Chapter 25 Compounds of Carbon Containing Halogens

NIOS Class 12 Chemistry Chapter 25 Compounds of Carbon Containing Halogens Solutions English Medium As Per New Syllabus to each chapter is provided in the list so that you can easily browse throughout different chapters NIOS Class 12 Chemistry Chapter 25 Compounds of Carbon Containing Halogens Notes in English and select need one. NIOS Class 12 Chemistry Solutions English Medium Download PDF. NIOS Study Material of Class 12 Chemistry Notes Paper Code: 313.

NIOS Class 12 Chemistry Chapter 25 Compounds of Carbon Containing Halogens

Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Chemistry Notes, NIOS Senior Secondary Course Chemistry Solutions in English for All Chapter, You can practice these here.

Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes)

Chapter: 25

INTEXT QUESTIONS 25.1

1. Write the IUPAC names of each of the following compounds :

Ans: 2-Chloropentane.

(ii) 

Ans: 3-Iodo-2-methylpentane.

(iii) 

Ans: l-Chloro-2,3-dimethylpentane.

(iv) 

Ans: 1,3,4-Trichloro-6-methylbenzene or 2,4,5 – Trichlorotoluene.

(v)

Ans: 1,3-Dibromo-5-ethylbenzene.

(vi) 

Ans: 2,4-Dibromohexane.

2. Draw structural formulae of the following compounds:

(i) 2-Bromo-3-methylbutane.

Ans: 

(ii) 3-Chloro-4-methylhexane.

Ans: 

(iii) 3-Bromochlorobenzene.

Ans:

(iv) 2,4-Dibromotoluene.

Ans:

INTEXT QUESTIONS 25.2

1. Write the structure of the main product obtained by treating 1-propanol with excess of hydrogen chloride in the presence of anhydrous zinc chloride.

Ans: CH₃CH₂CH₂Cl.

2. What will be the product obtained on treatment of 1-propanol with thionyl chloride?

Ans: 1-chloropropane.

3. Give one example of preparation of chlorbenzene using Sandmeyer reaction?

Ans: The Diazonium salt on treatment with copper (I) chlorideCu₂ Cl₂ gives Chlorobenzene.

4. Complete the following reaction :

Ans:

INTEXT QUESTIONS 25.3

1. Although haloalkanes are polar in nature, they are immiscible in water. Explain.

Ans: Due to their inability to form hydrogen bonds.

2. Which one of the following isomers has the higher boiling point and why?

(i) o-dichlorobenzene.

(ii) p-dichlorobenzene.

Ans: Para dichlorobenzene; due to greater symmetry and hence a better packing.

3. What will be the products of nitration of chlorobenzene?

Ans:

4. What products will obtained when ethylbromide reacts with:

(i) aq. KOH and

Ans: 

(ii) alc. KOH

Ans:

5. What is the major product of elimination reactions of  2-bromobutane?

Ans:

INTEXT QUESTIONS 25.4

1. Write IUPAC names of chloroform and iodoform.

Ans: (i) Trichloromethane.

(ii) Triiodomethane.

2. Why is chloroform stored in dark coloured bottles?

Ans: Chloroform oxidises to phosgene in the presence of air and sunlight. Dark coloured bottles reduce formation of poisonous phosgene.

3. What type of of compounds will give a positive iodoform test?

Ans:

Dark coloured bottles reduce formation of poisonous phosgene.

4. Name two commonly used polyhalogen compounds.

Ans: DDT, BHC, CHCl₃  and CHI₃.

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