Catalyst decomposition of hydrogen peroxide is a ........ order reaction

The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below

${O_3}(g)\, + \,C{l^ * }(g)\, \to \,{O_2}(g) + Cl{O^ * }(g)$ ..... $(i)$               $[{K_i} = 5.2 \times {10^9}\,\,L\,mo{l^{ - 1}}\,{s^{ - 1}}]$

$Cl{O^ * }(g) + {O^ * }(g)\, \to \,{O_2}(g) + \,C{l^ * }(g)$ ..... $(ii)$                $[{K_{ii}} = 2.6 \times {10^{10}}\,\,L\,mo{l^{ - 1}}\,{s^{ - 1}}]$

The closest rate constant for the overall reaction 

${O_3}(g){\mkern 1mu}  + {\mkern 1mu} {O^*}(g){\mkern 1mu}  \to {\mkern 1mu} 2{O_2}(g)$ is  ........... $L\,\,mo{l^{ - 1}}\,{s^{ - 1}}$

For reaction
$X_2(g) + Y_2(g) \rightarrow  2XY (g)$

The following data are observed

Rate constant of reaction will (in $M^{1-n}\,sec^{-1}$) where $'n'$ is order of reaction 

Explain order of reaction of complex reaction by giving examples.

Following is the rate constant of reaction what is the overall order of reaction ?

$(a)$ $6.66 \times 10^{-3} \,s ^{-1}$

$(b)$ $4.5 \times 10^{-2} \,mol ^{-1} \,L \,s ^{-1}$

The hydrolysis of ethyl acetate is a reaction of ......... order

$C{{H}_{3}}COOEt+{{H}_{2}}O\xrightarrow{{{H}^{+}}}C{{H}_{3}}COOH+EtOH$