1.

List the hydrogen halide acids in decreasing order of reactivity in the following reaction R-OH + HX to RX + H_2O

Answer»

HBr gtHI gtHClgtHF<BR>HIgtHBrgtHClgtHF
HIgt HFgt HBr gt HCl
HIgt HCI gt HBr gt HF

Solution : The relative rate follows same order as of ACIDITY (HI gt HBr gtHClgt HF) and the nucleophilicity of their coniugate anion, X- `(I^(-) gt Br^(-) gt Cl^(-) gt F^(-))`


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