Chemistry Class-11: Chapter –13. Hydrocarbons Part – 8
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Question: 43
Match the reactions given in Column I with the reaction types in Column II.
| Column I | Column II | ||
| (i) |
| (a) | Hydrogenation |
| (ii) |
| (b) | Halogenation |
| (iii) |
| (c) | Polymerization |
| (iv) |
| (d) | Hydration |
| (e) | Condensation | ||
Answer:
(i) → (d) (ii) → (a) (iii) → (b) (iv) → (c)
V. Assertion and Reason Type
In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.
Question: 44
Assertion (A): The compound cyclooctane has the following structural formula:
Cyclooctane
The compound cyclooctane
It is cyclic and has conjugated 8π-electron system but it is not an aromatic compound.
Reason (R):
electrons rule does not hold good and ring is not planar.
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.
Answer: (i)
Question: 45
Assertion (A): Toluene on Friedel Crafts methylation gives and xylene.
Reason (R): group bonded to benzene ring increases electron density at o– and p– position.
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct.
Answer: (i)
Question: 46
Assertion (A): Nitration of benzene with nitric acid requires the use of concentrated sulphuric acid.
Reason (R): The mixture of concentrated sulphuric acid and concentrated nitric acid produces the electrophile, .
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv) A is not correct but R is correct
Answer: (i)
Question: 47
Assertion (A): Among isomeric pentanes, 2, 2-dimethylpentane has highest boiling point.
Reason (R): Branching does not affect the boiling point.
(i) Both A and R are correct and R is the correct explanation of A. (ii) Both A and R are correct but R is not the correct explanation of A. (iii) Both A and R are not correct. (iv) A is not correct but R is correct.
Answer: (iii)