Arrange the following substances in order from weakest to strongest acid: HClO3, HOI, HClO3, HBrO2, HClO2, HIO2

Explanation:

Such type of compounds that have hydrogen, oxygen and one other element like Chlorine, Bromine etc and one hydrogen atom is directly connected with oxygen atom are called as oxyacid.

               The acidic strength of such oxyacid which contains same element is determined by the number of oxygen atoms. Such as in the case of  , is  the weakest acid because it has only two oxygen while is the strongest acid because it has four oxygen atoms.

                When the compound contains same number of oxygen and hydrogen atoms but one different element then the acidic strength depends on the electronegativity  of the element. So in the case of , is the weakest acid because it contain iodine element that has less electronegativity while  is strongest acid because chlorine atom has high electronegativity. So the overall order in weakest to strongest will be .

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

i'm pretty sure its b i might be wrong though!