hazardous reaction

[hubblebubble]

which of these reactions is most hazardous and why?

the test for;

* bromoethane using ethanolic silver nitrate,
* butanol using acidified potassium dichromate,
* ethanoic acid using sodium hydrogencarbonate,
* methylpropan2ol using the lucas test
* water using anyhdrous copper sulphate.

[Peter Pedant]

I think they be asking you which is the most exothermic

and I think it may be the last one

[nightmare]

PP
....think they be asking you... ?

unusual grammatical construction, especially for a self-claimed pedant !