Which one is NOT an acid?

Exercise and reference answers

Questions

1. Items

   1. NaOH
   2. HCl
   3. H2SO4
   4. HNO3

   Reason

   NaOH is a base (it gives OH- ions); HCl, H2SO4 and HNO3 are all acids.

   Odd item

   NaOH