320552 Consider the reaction
\({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{(aq) + }}{{\rm{H}}_{\rm{2}}}{\rm{\;S(aq)}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}\)
The rate equation for this reaction is,
\({\rm{ Rate   =  k}}\left[ {{\rm{C}}{{\rm{l}}_{\rm{2}}}} \right]\left[ {{{\rm{H}}_{\rm{2}}}\;{\rm{S}}} \right]\)
Which of these mechanisms is/are consistent with this rate equation?
(I) \({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{ + }}{{\rm{H}}_{\rm{2}}}{\rm{S}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}{\mkern 1mu} {\mkern 1mu} ({\rm{slow}})\)
\({\rm{C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + S}}{\mkern 1mu} {\mkern 1mu} ({\rm{fast}})\)
\({\text{(II)}}{\mkern 1mu} {\mkern 1mu} \,\,{{\text{H}}_{\text{2}}}\;{\text{S}} \rightleftharpoons {{\text{H}}^{{\text{   +   }}}}{\text{   +   H}}{{\text{S}}^{{\text{   -   }}}}{\text{(fast}}\,\,{\text{equilibrium) }}\)
\({\text{C}}{{\text{l}}_{\text{2}}}{\text{  +  H}}{{\text{S}}^{{\text{  -  }}}} \to {\text{2C}}{{\text{l}}^{{\text{  -  }}}}{\text{  +  }}{{\text{H}}^{{\text{  +  }}}}{\text{  +  S}}{\mkern 1mu} {\mkern 1mu} {\text{(slow)}}\)

320553 A reaction involving two different reactants in rate determining step can never be

320554 Assertion :
Molecularity has no meaning for a complex reaction.
Reason :
The overall molecularity of a complex reaction is equal to the molecularity of the slowest step.

320555 For an elementry reaction, \(2 A+B \rightarrow C+D\) the molecularity is

320552 Consider the reaction
\({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{(aq) + }}{{\rm{H}}_{\rm{2}}}{\rm{\;S(aq)}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}\)
The rate equation for this reaction is,
\({\rm{ Rate   =  k}}\left[ {{\rm{C}}{{\rm{l}}_{\rm{2}}}} \right]\left[ {{{\rm{H}}_{\rm{2}}}\;{\rm{S}}} \right]\)
Which of these mechanisms is/are consistent with this rate equation?
(I) \({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{ + }}{{\rm{H}}_{\rm{2}}}{\rm{S}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}{\mkern 1mu} {\mkern 1mu} ({\rm{slow}})\)
\({\rm{C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + S}}{\mkern 1mu} {\mkern 1mu} ({\rm{fast}})\)
\({\text{(II)}}{\mkern 1mu} {\mkern 1mu} \,\,{{\text{H}}_{\text{2}}}\;{\text{S}} \rightleftharpoons {{\text{H}}^{{\text{   +   }}}}{\text{   +   H}}{{\text{S}}^{{\text{   -   }}}}{\text{(fast}}\,\,{\text{equilibrium) }}\)
\({\text{C}}{{\text{l}}_{\text{2}}}{\text{  +  H}}{{\text{S}}^{{\text{  -  }}}} \to {\text{2C}}{{\text{l}}^{{\text{  -  }}}}{\text{  +  }}{{\text{H}}^{{\text{  +  }}}}{\text{  +  S}}{\mkern 1mu} {\mkern 1mu} {\text{(slow)}}\)

320553 A reaction involving two different reactants in rate determining step can never be

320554 Assertion :
Molecularity has no meaning for a complex reaction.
Reason :
The overall molecularity of a complex reaction is equal to the molecularity of the slowest step.

320555 For an elementry reaction, \(2 A+B \rightarrow C+D\) the molecularity is

320552 Consider the reaction
\({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{(aq) + }}{{\rm{H}}_{\rm{2}}}{\rm{\;S(aq)}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}\)
The rate equation for this reaction is,
\({\rm{ Rate   =  k}}\left[ {{\rm{C}}{{\rm{l}}_{\rm{2}}}} \right]\left[ {{{\rm{H}}_{\rm{2}}}\;{\rm{S}}} \right]\)
Which of these mechanisms is/are consistent with this rate equation?
(I) \({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{ + }}{{\rm{H}}_{\rm{2}}}{\rm{S}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}{\mkern 1mu} {\mkern 1mu} ({\rm{slow}})\)
\({\rm{C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + S}}{\mkern 1mu} {\mkern 1mu} ({\rm{fast}})\)
\({\text{(II)}}{\mkern 1mu} {\mkern 1mu} \,\,{{\text{H}}_{\text{2}}}\;{\text{S}} \rightleftharpoons {{\text{H}}^{{\text{   +   }}}}{\text{   +   H}}{{\text{S}}^{{\text{   -   }}}}{\text{(fast}}\,\,{\text{equilibrium) }}\)
\({\text{C}}{{\text{l}}_{\text{2}}}{\text{  +  H}}{{\text{S}}^{{\text{  -  }}}} \to {\text{2C}}{{\text{l}}^{{\text{  -  }}}}{\text{  +  }}{{\text{H}}^{{\text{  +  }}}}{\text{  +  S}}{\mkern 1mu} {\mkern 1mu} {\text{(slow)}}\)

320553 A reaction involving two different reactants in rate determining step can never be

320554 Assertion :
Molecularity has no meaning for a complex reaction.
Reason :
The overall molecularity of a complex reaction is equal to the molecularity of the slowest step.

320555 For an elementry reaction, \(2 A+B \rightarrow C+D\) the molecularity is

320552 Consider the reaction
\({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{(aq) + }}{{\rm{H}}_{\rm{2}}}{\rm{\;S(aq)}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}\)
The rate equation for this reaction is,
\({\rm{ Rate   =  k}}\left[ {{\rm{C}}{{\rm{l}}_{\rm{2}}}} \right]\left[ {{{\rm{H}}_{\rm{2}}}\;{\rm{S}}} \right]\)
Which of these mechanisms is/are consistent with this rate equation?
(I) \({\rm{C}}{{\rm{l}}_{\rm{2}}}{\rm{ + }}{{\rm{H}}_{\rm{2}}}{\rm{S}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}}{\mkern 1mu} {\mkern 1mu} ({\rm{slow}})\)
\({\rm{C}}{{\rm{l}}^{\rm{ + }}}{\rm{ + H}}{{\rm{S}}^{\rm{ - }}} \to {{\rm{H}}^{\rm{ + }}}{\rm{ + C}}{{\rm{l}}^{\rm{ - }}}{\rm{ + S}}{\mkern 1mu} {\mkern 1mu} ({\rm{fast}})\)
\({\text{(II)}}{\mkern 1mu} {\mkern 1mu} \,\,{{\text{H}}_{\text{2}}}\;{\text{S}} \rightleftharpoons {{\text{H}}^{{\text{   +   }}}}{\text{   +   H}}{{\text{S}}^{{\text{   -   }}}}{\text{(fast}}\,\,{\text{equilibrium) }}\)
\({\text{C}}{{\text{l}}_{\text{2}}}{\text{  +  H}}{{\text{S}}^{{\text{  -  }}}} \to {\text{2C}}{{\text{l}}^{{\text{  -  }}}}{\text{  +  }}{{\text{H}}^{{\text{  +  }}}}{\text{  +  S}}{\mkern 1mu} {\mkern 1mu} {\text{(slow)}}\)

320553 A reaction involving two different reactants in rate determining step can never be

320554 Assertion :
Molecularity has no meaning for a complex reaction.
Reason :
The overall molecularity of a complex reaction is equal to the molecularity of the slowest step.

320555 For an elementry reaction, \(2 A+B \rightarrow C+D\) the molecularity is