all acids are not corrosive.justify this statement

Answer 1

clearly false, since some acids are corrosive

Maybe you meant "not all acids are corrosive"

so, what ideas have you on that?
what exactly do you mean by corrosive?

Is lemon juice corrosive?
Vitamin C?
Boric acid?

Answer 2

All acids are not corrosive as only some acids which are harmful are corrosive and which are not harmful are not corrosive.