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Give reasons: (a) n-Butyl bromide has ...

Give reasons:
(a) n-Butyl bromide has higher boiling point than t-butyl bromide.
(b) Racemic mixture is optically inactive.
(c) The presence of nitro group (`-NO_(2)`) at op positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.

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Assertion: n- Buty chloride has higher boiling point than n-butyl bromide Reason C-CI bond is more polar than C-Br bond .

Assertion: n-butyl chloride has lower b.p than n-butyl bromide Reason The b.p inceases with increase in molar mass .

Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. Reason: Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

MODERN PUBLICATION-HALOALKANES AND HALOARENES-REVISION EXERCISE (Short Answer Questions)
  1. Answer the following: (i) Haloalkanes easily dissolve in organic so...

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  2. Althrough chlorine is an electron withdrawing group, yet it is ortho-p...

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  3. (a) Explain why thionyl chloride (SOCI(2)) method is preferred for pre...

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  4. How will you convert the following (any two)? Give chemical equations ...

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  5. Explain S(N)2 reaction mechanism of haloalkane. Arrange the reactivity...

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  6. (a) Explain why haloarenes undergoes electrophilic substitution reacti...

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  7. (a). Complete the reaction: CH(3)CH(2)Br+KOH(alc.) (b). Explain wh...

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  8. Explain why : (i) Sulphuric acid is not used during the reaction of ...

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  9. Following compounds are given to you : 2-Bromopentane, 2-Bromo-2-met...

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  10. (a) Alkyl halides react with AgNO(2) and KNO(2) to give R-NO(2) and R-...

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  11. (a) Write the following reaction: (i) Wurtz Fittig reaction (ii) B...

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  12. (a) Why are haloarenes less reactive than haloalkanes? (explain with r...

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  13. (a) Haloalkanes react with potassium cyanide (KCN) to give alkyl cyani...

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  14. Give reasons: (a) n-Butyl bromide has higher boiling point than t-bu...

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  15. Explain S(N)2 reaction mechanism of haloalkanes.

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  16. (a) Aryl halides are less reactive in nucleophilic substitution reacti...

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  17. Give reasons: (i). C-Cl bond length in chlorobenzene is shorter than...

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  18. (a) Write the equations for the steps involved in the S(N)1 mechanism ...

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  19. (a) Complete the reaction: (i) CH(3)CH(2)Br overset(AgCN)to (ii) C...

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  20. (i) Out of (CH(3))(3), C-Br and (CH(3))(3) C-I, which one is more reac...

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