DAV CENTENARY PUBLIC SCHOOL, PASCHIM ENCLAVE, NEW DELHI
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1 1How will you bring about the following conversions? (i) Ethanol to but-1-yne Ethane to bromoethene (iii) Propene to 1-nitropropane (iv) Toluene to benzyl alcohol (v) Propene to propyne (vi) Ethanol to ethyl fluoride (vii) Bromomethane to propanone (iii) (viii) But-1-ene to but-2-ene (ix) 1-Chlorobutane to n-octane (x) Benzene to biphenyl. (i) (iv) (v)
2 (vi) (ix) (vii) (x) 2How the following conversions can be carried out? (i) Propene to propan-1-ol Ethanol to but-1-yne (viii) (iii) 1-Bromopropane to 2-bromopropane (iv) Toluene to benzyl alcohol (v) Benzene to 4-bromonitrobenzene
3 (vi) Benzyl alcohol to 2-phenylethanoic acid (vii) Ethanol to propanenitrile (viii) Aniline to chlorobenzene (ix) 2-Chlorobutane to 3, 4-dimethylhexane (x) 2-Methyl-1-propene to 2-chloro-2-methylpropane (xi) Ethyl chloride to propanoic acid (xii) But-1-ene to n-butyliodide (xiii) 2-Chloropropane to 1-propanol (xiv) Isopropyl alcohol to iodoform (xv) Chlorobenzene to p-nitrophenol (xvi) 2-Bromopropane to 1-bromopropane (xvii) Chloroethane to butane (xviii) Benzene to diphenyl (xix) tert-butyl bromide to isobutyl bromide (xx) Aniline to phenylisocyanide Answer (i) (iii)
4 (iv) (vii) (v) (viii) (vi) (ix)
5 (x) (xi) (xiv) (xii) (xv) (xiii)
6 (xix) (xvi) (xx) Q3 How are the following conversions carried out? (i) Propene Propan-2-ol Benzyl chloride Benzyl alcohol (xvii) (iii) Ethyl magnesium chloride Propan-1-ol. (iv) Methyl magnesium bromide 2-Methylpropan-2-ol. Answer (xviii) (i) If propene is allowed to react with water in the presence of an acid as a catalyst, then propan-2-ol is obtained.
7 If benzyl chloride is treated with NaOH (followed by acidification) then benzyl alcohol is produced. (iii) When ethyl magnesium chloride is treated with methanal, an adduct is the produced which gives propan-1-ol on hydrolysis. Q4 Show how would you synthesise the following alcohols from appropriate alkenes? (i) The given alcohols can be synthesized by applying Markovnikov s rule of acid-catalyzed hydration of appropriate alkenes. (iv) When methyl magnesium bromide is treated with propane, an adduct is the product which gives 2-methylpropane-2-ol on hydrolysis. (i)
8 Q5 Give names of the reagents to bring about the following transformations: (i) Hexan-1-ol to hexanal Cyclohexanol to cyclohexanone (iii) p-fluorotoluene to p-fluorobenzaldehyde (iv) Ethanenitrile to ethanol (v) Allyl alcohol to propenal (vi) But-2-ene to ethanol A (iii) Q 6 (i) Show how each of the following compound can be converted into Ethylbenzene Acetophenone (iii) Bromobenzene (iv) Phenylethene (Styrene) (iv) Q7 Write chemical reactions to affect the following transformations: (i) Butan-1-ol to butanoic acid Benzyl alcohol to phenylethanoic acid (iii) 3-Nitrobromobenzene to 3-nitrobenzoic acid (iv) 4-Methylacetophenone to benzene-1,4-dicarboxylic acid (v) Cyclohexene to hexane-1,6-dioic acid (vi) Butanal to butanoic acid.
9 Q8 acid How will you convert ethanal into the following compounds? (i) Butane-1, 3-diol But-2-enal (iii) But-2-enoic A (i) On treatment with dilute alkali, ethanal produces 3- hydroxybutanal gives butane-1, 3-diol on reduction. On treatment with dilute alkali, ethanal gives 3- hydroxybutanal which on heating produces but-2-enal. (iii) When treated with Tollen s reagent, But-2-enal produced in the above reaction produces but-2-enoic acid. Q9 How will you prepare the following compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom
10 (i) Methyl benzoate m-nitrobenzoic acid (iii) p-nitrobenzoic acid (iv) Phenylacetic acid (v) p-nitrobenzaldehyde. (i) (iv) (v) (iii) Q10How will you bring about the following conversions in not more than two steps?
11 (i) Propanone to Propene Benzoic acid to Benzaldehyde (iii) Ethanol to 3-Hydroxybutanal (iv) Benzene to m-nitroacetophenone (iv) (v) Benzaldehyde to Benzophenone (vi) Bromobenzene to 1-Phenylethanol (vii) Benzaldehyde to 3-Phenylpropan-1-ol (v) (viii) Benazaldehyde to α-hydroxyphenylacetic acid (ix) Benzoic acid to m- Nitrobenzyl alcohol (i) (vi) (iii)
12 (vii) (viii) (iii) Q12Convert (i) 3-Methylaniline into 3-nitrotoluene. Aniline into 1,3,5 tribromobenzene. Answer (i) (ix) Q11 How will you convert? (i) Benzene into aniline Benzene into N, N-dimethylaniline (iii) Cl (CH 2 ) 4 Cl into hexan-1, 6-diamine? Answer (i)
13 Q13 How will you convert: (i) Ethanoic acid into methanamine Hexanenitrile into 1-aminopentane (iii) Methanol to ethanoic acid (iv) Ethanamine into methanamine (iii) A (i) (v) Ethanoic acid into propanoic acid (vi) Methanamine into ethanamine (vii) Nitromethane into dimethylamine (viii) Propanoic acid into ethanoic acid (iv)
14 (viii) (v) Q14Accomplish the following conversions: (i) Nitrobenzene to benzoic acid Benzene to m-bromophenol (vi) (iii) Benzoic acid to aniline (iv) Aniline to 2,4,6-tribromofluorobenzene (v) Benzyl chloride to 2-phenylethanamine (vi) Chlorobenzene to p-chloroaniline (vii) Aniline to p-bromoaniline (vii) (viii) Benzamide to toluene (ix) Aniline to benzyl alcohol. Answer (i)
15 (iv) (iii) (v)
16 (vi) (viii) (vii) (ix)
17
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