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A catalyst alters the rate of a reaction by leading of increasing the energy of activation, In Heterogeneus catalysis adrosption mechanism occurs and Hemogeneus. Catalysis intermediate formation occurs. In auto catalysis one of the products acts on catalyst. 2SO_2 + O_(2) overset(NO(g))(rarr)2SO_3. This reaction is carried out through formation of ----- intermediate.

Answer»

`N_2O`
`NO_2`
`N_2O_4`
`N_2O_3`

SOLUTION :`2NO + O_2 to 2NO_2`
`NO_2 + SO_2 to SO_3 + NO` INTERMEDIATE is `NO_2`


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