Question

plzZ aNswer this....​

Answer 1

A is most acidic as its pH value is 6

A,D,B AND C

Answer 2

electricity
H2O.....H2+Cl2
light
2Agcl......2Ag+Cl2
heat
CaCo3.....CaO+Co2
the most acidic in them is A
increasing order of H+ions are
6,7,9,12
those acid which when dissolve in water and give large amount of H+ions called strong acid
and those which give small amount of H+ions called weak acid