give 4 examples of zero order reaction?

Examples of zero order reaction:

1) Photochemical reaction between hydrogen and chlorine:

           hv

  H2(g) + Cl2(g)  →  2HCl(g)

2) Decomposition of N2O on hot platinum surface:

  N2O →  N2  +  1/2 O2

3) Decomposition of NH3 in presence of molybdenum or tungsten is a zero-order reaction.

   Mo]

  2NH→  N2 + 3H2

4) Iodations of acetone in presence of H+ ions.

   H+

 CH3COCH3 + I2  →  ICH2COCH3 + HI

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