Which is the best procedure to follow if a student spills several drops of concentrated HCl on his hand?

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The order of ractivity of the following alcohols towards concentrated HCl is

Which procedure is followed for amplification of DNA?

Which is the weakest out of HF, HCl, HBr and HI?

Which of the following is the best procedure to make isopropyl methyl ether using the Williamson's method ?