1.

For dofferemt reactions of H_(2)SO_(4) with(i) HNO_(3) and (ii) HClO_(4), a. Write the equactions for therecactionsand identify the conjugate acids and bases: b. Expain the differentbehaviours of H_(2)SO_(4) II. Nitrobenze can be prepared from benzeneby usinga mixtureof conc. HNO_(3) and conc. H_(2)SO_(4) In the nitratingmixture, HNO_(3) acrs are: a. Base, b. Acid c. Reducingagent, d. Catayst III. Among the following statements on the nitraction of aromatic compounds, the false one is: a. The rateof nitration of benzene is almost the sameas that of hexadeucterobenzene. b. The rate of nitration of touene is grater than that of benzene. c. The rate of nitration of benzene is greater than that of hexadeuterobenze. c. The rate of nitration of benzene is greater than that of hexadeuterobenezene. d. Nitration is an electrophillic subsitution reaction. IV. Select the correct alternatice(s). The following reaction occurs in a mixture of conc. HNO_(3) and cnc. H_(2)SO_(4) as: HNO_(3) + 2H_(2)SO_(4) rarr NO_(2)^(o+) + 2HSO_(4)^(o+) + H_(3)^(o+) Which of the following statements about this reaction is correctgt a. Nitric acid acts as a base. b. Sulphuric acid acts as a base. Sulphureacid acts as a dehydrating agent. d. Addition of H_(2)O will reduce the NO_(2)^(o+) concentration. e. HNO_(3) and NO_(2)^(o+) are conjugate acid-base pair.

Answer»

Solution :a. i.
i. `H_(2)SO_(4)` a STRONGER acid, GIVESA proton to `HNO_(3)`, a weaker acid now acting as a base.
II. `H_(2)SO_(4)` is the weakeracid and acts as the base to accept a proton from `HclO_(4)`
II. a. III. c. IV. a and d.


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