The introduction of NO2 group in benzene ring is called 'Nitration'. The nitration of benzene takes place when it is heated with a 1:1 mixture of _ at 50 oC-55 oC.
Correct answer: D. Conc. HNO3 and conc. H2SO4
- A. Conc. HNO3 and conc. HCl
- B. Conc. HNO3 and conc. Acetic acid
- C. Conc. HNO3 and H3PO4
- D. Conc. HNO3 and conc. H2SO4
Explanation
A is incorrect as these reactants are not used in nitration.B is incorrect as these reactants are not used in nitration.C is incorrect as these reactants are not used in nitration.D is correct as HNO3(aq) and H2SO4(aq) are used in 1:1 ratio for nitration of benzene.(fact)
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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