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Q1) Mention a use of either esters of benzoic acid or of sodium benzoate (1) Q2) Write chemical equations and reactions for foll conversions (i) ethane to ethanol (ii) phenol to phenyl ethanoate (iii) Ethanal to 2-propanol (3) (iii) Toulene to benzaldehyde (iv) Acetic acid to ethyl amine (2) Q3) Account for the foll (i) Haloalkanes undergo nucleophilic substitution reactions (ii) Alcohols act as weak bases (iii) Phenols exhibit an acidic character (3) Q4) How can u get (i) isopropyl bromide and (ii) n-propyl bromide from propylene (2)
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Q5) Descrine the foll (I) Protonation (ii) Acetylation (3) (pge 22) Q6) Account for foll (i) Phenols has a smaller dipole moment than methanol (ii) Phenols do not give protonation reactions readily (iii) Haloarenes undergo electrophilic substitution reactions (3) (iv) Haloalkanes are more reactive than haloarenes (2) (V) Nu- substitution of p-nitrochlorobenzene is easier than that of chlorobenzene (2) Q7) How are the foll conversions carried out (Write reactions and conditions) (i) Propanoic acid to 1-propanal (ii) Acetophenone to benzoic acid (iii) Actone to t-butyl alcohol (3) (iv) phenol to 2-acetoxybenzoic acid (2) Q8) Describe (i) Trans-esterification (2) (ii) Decarboxylation (2)
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Q9) How are the foll conversions carried (i) Chlorobenzene to phenol (ii) ethane to 1,2 –ethanediol (iii) Phenol to salicyaldehyde (3) (pge 39) (iii) acetophenone to 2-phenyl-2-butanol (2) Q10) A sweet smelling O.C “A” is slowly oxidized by air in the presence of light to ahighly poisonous gas. On warming with silver powder, it forms a gaseous substance “B” which is also produced by the action of calcium carbide on water. Identify “A” and “B” and write the equation of the reactions involved (5) Q11) Give structural formulas and names of the products of the foll (i) Chloroform is heated with aniline in presence of alc.KOH (ii) Phenols is treated with an excess of aqueous bromine (2) Q12) Explain the mechanism of the reaction of benzene with a mixture of conc nitric acid and conc sulphuric acid (3)
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Q13) What is an ambident group .Give an example (1) Q14) Write chemical test to distinguish between (i) Phenol to benzoic acid (ii) propanal to propanone (iii) formic acid into acetic acid (3) Q15) You are provided with four reagents LiAlH4, I2/NaOH, NaHSO3 and Schiff’s reagent .Write which two reagents can be used to distinguish between the compounds in each of the foll pairs (i) CH3CHO and CH3COCH3 (ii) CH3CHO and C6H5CHO (iii) C6H5COCH3 and C6H5COC6H5 (3) Q16) Write one chemical reaction each of foll (i) Cannizzaro reaction (ii) Williamson’s synthesis (3) Q17) How would u distinguish between ethanol and phenol (2)
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Q18) Explain the mechanism of Nu- substitution reactions with suitable example (3) Q19) Explain how an OH group attached to a carbon in the benzene ring activates benzene towards electrophilic substitution (2) Q20) Write short note on (i) Friedel crafts reaction (ii) Gattermann koch reaction (3) (iii) sandmeyer’s reaction (2) Q21) How is tert-butyl alcohol obtained from acetone (2) Q22) What is Saytzeff rule. Illustrate with suitable example (3) Q23) How would u account for foll (i) Phenols are much more acidic than alcohols (ii) The B.P of ethers are much lower that those of the alcohols of comparable molar mass (2)