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Subject

Chemistry

Chapter

Ch 10Halogen Derivatives

Weightage~7marksapprox

10.1Classification of halogen derivativesRead →

10.2Nomenclature of halogen derivativesRead →

10.3Methods of preparation of alkyl halidesRead →

10.4Physical propertiesRead →

10.5Optical isomerism in halogen derivativesRead →

10.6Chemical propertiesRead →

10.7Uses and Environmental effects of some polyhalogen compoundsRead →

CBSE Sample Papers25 Q

Q1How is chlorobenzene prepared from aniline? How is chlorobenzene converted into diphenyl?Q2The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as ____. (a) Williamson's reaction (b) Finkelstein reaction (c) Swarts reaction (d) Wurtz reaction Q3CH₃-CH₂-Br xrightarrowAlcoholic KOH/Δ B xrightarrowHBr C xrightarrowNa/ether D, the compound D is ____. (a) ethane (b) propane (c) n-butane (d) n-pentane Q4Define racemic mixture. Give IUPAC name of the compound whose condensed structural formula is printed as: CH₃-CH₂-CH(CH₃)-CHO (the CH₃ branch is drawn on a vertical bond above the CH carbon).Q5Identify 'A' in the following reaction — A + 2Na xrightarrowDryether 2,2,5,5-Tetramethylhexane + 2NaBr (a) 2-Bromo-2-methylbutane (b) 1-Bromo-2,2-dimethylpropane (c) 1-Bromo-3-methylbutane (d) 1-Bromo-2-methylpropane Q6Explain only reaction mechanism for alkaline hydrolysis of tert-butylbromide.Q7What is the action of the following on ethyl bromide (i) alcoholic solutions of potassium hydroxide (ii) moist silver oxide (iii) silver acetate?Q8Conversion of methyl chloride into methyl fluoride is known as ____. (a) Finkelstein reaction (b) Swarts reaction (c) Williamson's synthesis (d) Wurtz reaction Q9Write the chemical reactions of chlorobenzene with respect to: (a) Sulphonation (b) Acetylation (c) Nitration Q10Write the product formed when alkyl halide reacts with silver nitrite.Q11What is the action of following on ethyl bromide: (i) Na in dry ether (ii) Mg in dry ether Q12Write chemical reactions for the following conversions: (i) Ethyl bromide to ethyl methyl ether. (ii) Ethyl bromide to ethene. (iii) Bromobenzene to toluene. (iv) Chlorobenzene to biphenyl.Q13The allylic halide, among the following is ____. (a) R-CH(X)-R (X on a carbon between two R groups, i.e. a secondary alkyl halide) (b) CH₂=CH-X (vinylic halide) (c) an aryl halide: benzene ring with X directly attached to the ring (d) CH₂=CH-CH₂-X Q14Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.Q15Write the chemical reactions for the following: (a) Chlorobenzene is heated with fuming H₂SO₄ (b) Ethyl bromide is heated with silver acetate Q16Explain dehydrohalogenation reaction of 2-chlorobutane. Write use and environmental effect of CFC.Q17Among the following vinylic halide is ___. (a) R-undersetXunderset|CH-R (b) CH₂=CH-X (c) Benzene ring with X substituent directly attached to the ring (aryl halide structure) (d) CH₂=CH-CH₂-X Q18Complete the reaction: CH₃CH₂Cl xrightarrow[alc.Δ]AgCN ?Q19Write preparation of (a) diethyl ether (b) ethyl cyanide from ethyl bromide.Q20What is the action of following on ethyl bromide? (a) silver nitrite (b) Mg in dry ether (c) alcoholic sodium hydroxide Q21Identify 'A' and 'B' in the following reaction and rewrite the complete reaction: CH₃-CH=CH₂ xrightarrow[Peroxide]HBr A xrightarrow[-KBr]alcoholicKCN B Q22(a) Write salient features of SN2 mechanism. (b) What is the action of following reagents on bromomethane: (i) bromobenzene (ii) mercurous fluoride Q23Acetonitrile may be prepared by heating the following reactants: (a) Ethyl chloride with alcoholic KCN (b) Ethyl chloride with alcoholic AgCN (c) Methyl chloride with alcoholic KCN (d) Methyl chloride with alcoholic AgCN Q24What is the action of following reagents on chlorobenzene? (i) conc. HNO₃ (ii) fuming H₂SO₄ Q25(i) Convert, ethanoic acid to ethanol. (ii) Explain the mechanism of alkaline hydrolysis of bromomethane.

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Ch 10 — Halogen Derivatives

Question 59 of 62

_N

(b) What is the action of following reagents on bromomethane:

(i) bromobenzene

(ii) mercurous fluoride

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