Each oxy-acid contains at least one X−OH unit (X is non-metal). The H-atom of X−OH unit is ionisable and the number of −OH groups directly attach to non-metal decides the basicity of oxy-acid.
Which of the following oxy-acid does not have its peroxy form having two central atoms?
a. H2SO4
b. HNO3
c. H3PO4
d. None