Q.5 Acetylene on polymerisation gives -

Q.6 Benzene is obtained by fractional distillation of -

Q.7 When vapour of n-hexane are passed over Pt supported on Al2O3 at 500oC benzene forms.The reaction involves -

Q.8 The general formula of arenes is -

Q.11 Pyrogallol is ......... trihydroxy benzene –

Q.10 Match the structures given in list I with the

names given in list II and then select the

correct answer from the codes given below

the lists –

List I List II

(1) (a) Dewar

(2) (b) Claus

(3) (c) Kekule

(4) (d) Ladenburg

Q.12 Which of the following statements is incorrect for benzene –

Q.13 Which one of the following statements is wrong -

Q.14 Benzene reacts with fuming sulphuric acid to give -

Q.15 Which of the following reactions is not shown by benzene –

Q.21 Among the following statements on the nitration of aromatic compounds, the false one is –

Q.22 Which reaction sequence would be best to prepare 3–chloroaniline from benzene –

Q.23 Reaction of SO3 is easier in –

Q.24 Benzene reacts with sulphuric acid only when the acid is –

Q.25 Carbocations are formed by all of the follow-ing reactions except –

Q.26 Benzene on air oxidation gives -

Q.27 Friedel–Crafts' reaction does not occur in case of –

Q.1 The electrophile involved in chlorination of benzene is -

Q.2 The well known insecticide, Gammexane is one of the stereoisomers of hexachlorocyclohexane. The reagent useful for conversion of benzene into hexachlorocyclohexane is -

Q.3 Acylation of benzene to produce aliphatic aromatic ketones is called –

Q.5 Which of the following is not correctly matched –

Q.6 Benzene does not react with the following except –

Q.7 Benzene easily shows –

Q.8 Benzene is extraordinarily stable because –

Q.21 Benzene is a resonance hybrid mainly of two Kekule structures. Hence –

Q.22 Which of the following reactions of benzene does not prove the presence of three carbon — carbon double bonds in it –

Q.23 The number of benzylic hydrogens in ethylbenzene is –

Q.24 Benzene does not undergo addition reactions easily because -

Q.25 The reaction of replacement of a hydrogen atom in benzene by alkyl group can be brought about with the following reagents except –

Q.1 Select the correct statement about benzene–

Q.4 The dipole moment of chlorobenzene is 1.6 D. The expected dipole moment of p-dichlorobenzene is -

Q.7 Benzene reacts with sulphuric acid to form benzenesulphonic acid, only when the sulphuric acid is–

Q.12 The number of possible dichloronitrobenzene isomers is -

Q.1 Bottles containing C6H5I and C6H5CH2 I lost their original labels. They were labelled A and B for testing. A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO3 and then some AgNO3 solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment ?

Q.2 Fluorobenzene (C6H5F) can be synthesized in the laboratory -

Q.3 Phenyl magnesium bromide reacts with methanol to give -

Q.1 Aryl halides are less reactive towards nucleophilic substituion reaction as compared to alkyl halides due to -

Q.2 Among the following statements on the nitration of aromatic compounds, the false one is -

Q.3 A solution of (+) - 2 - chloro-2-phenylethane in toluene racemises slowly in the presence of small amount of SbCl5, due to the formation of -