engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test General Science Chemistry Periodic Table
Which of the following oxoacid of sulphur has − O − O − linkage?
1
H2S2O8, peroxodisulphuric acid
2
H2S2O7, pyrosulphuric acid
3
H2SO3, sulphurous acid
4
H2SO4, sulphuric acid