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KVPY Sample Paper KVPY Stream-SX Model Paper-1

  • question_answer
    Decreasing order of relative nucleophilicity of the following nucleophiles in protic solvent is - \[\overset{\Theta }{\mathop{S}}\,H,\,\,Ac\overset{\Theta }{\mathop{O}}\,,\,\,Ph\overset{\Theta }{\mathop{O}}\,,\overset{\Theta }{\mathop{\,\,O}}\,\,H,\,\,{{H}_{2}}O\]

    A) \[\overset{\Theta }{\mathop{S}}\,H\,>\,\overset{\Theta }{\mathop{O}}\,H>{{H}_{2}}O>Ac\overset{\Theta }{\mathop{O}}\,>Ph\overset{\Theta }{\mathop{O}}\,\]

    B) \[\overset{\Theta }{\mathop{S}}\,H>\overset{\Theta }{\mathop{O}}\,H>Ph\overset{\Theta }{\mathop{O}}\,>Ac\overset{\Theta }{\mathop{O}}\,>{{H}_{2}}O\]

    C) \[\overset{\Theta }{\mathop{S}}\,H>Ph\overset{\Theta }{\mathop{O}}\,>\overset{\Theta }{\mathop{O}}\,H>{{H}_{2}}O>Ac\overset{\Theta }{\mathop{O}}\,\]

    D) \[\overset{\Theta }{\mathop{O}}\,H>\overset{\Theta }{\mathop{S}}\,H>Ph\overset{\Theta }{\mathop{O}}\,>Ac\overset{\Theta }{\mathop{O}}\,>{{H}_{2}}O\]

    Correct Answer: B

    Solution :

    [B] Nucleophilicity \[\propto \]Size (in group)


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