Multistage catalytic converter is not used in the

A. Conversion of SO2 to SO3

B. NH3 synthesis reaction

C. Both (A) and (B)

D. Neither (A) nor (B)

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  20. Alcohol is produced by the
  21. __________ is a thermosetting plastic.
  22. Enzymes are
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  24. Neon gas is
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