G.G.N PUBLIC SCHOOL ASSIGNMENT- CHEMISTRY CLASS- XII (Ch 10 and 11) 1. Which test can be used to check the difference in reactivity of 10, 20 & 30 class of alcohols? 2. Arrange in order of increasing boiling points 1-chloropropane, isopropyl chloride & 1- chlorobutane. 3 p-Dichlorobenzene has higher m.p & solubility those of o- & m- isomers. Discuss. 4. How can you separate the mixture of o-nitrophenol and p-nitrophenol. 5. Name the polyhalogen compound. i) first chlorinated organic insecticides. ii) which can upset the natural ozone balance. 6. Which compound would undergo SN2 reaction faster? 1-Chlorobutane or 2-Chloro-2methyl propane. 7. Aryl halides are extremely less reactive towards nucleophilic substitution reactions . 8. Write mechanism of dehydration of alcohol. 9. Explain why: 1 propanol has higher B.P than that of hydrocarbon, butane. 2 orthonitrophenol is more acidic than orthomethoxy phenol. 10 What are ambident nucleophiles? Explain with an example. 11 How will you distinguish between n- propyl alcohol and isopropyl alcohol. 12 The treatment of alkylchlorides with aq. KOH leads to formation of alcohols but in presence of alcoholic KOH, alkenes are the major products. 13 Explain friedel-crafts reaction of anisole. 14 Name the process by which ethanol is prepared. What is denaturation of alcohol. 15 Write reaction of aryl halide with metals. What name is given to these reactions. 16 How will you convert the follwing 1 Ethyl magnesium chloride to proapan-1-ol. 2 Aniline to chlorobenzene 17 What happens when 1) phenol reacts with bromine in aqueous medium. 2) phenol is heated with zinc dust. 3) phenol is treated with dilute nitric acid. 18 a) Explain Williamson synthesis for ethers. b) What do you mean by chirality 19 Explain how does –OH group attached to carbon of benzene ring activates it towards electrophilic substation reaction. 20 What happens when 10, 20, 30 alcohols are treated with Cu at 573 K.