state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 General Science Chemistry Periodic Table

निम्न में से 'ओलियम' का सही सूत्र पहचानिये।

1
H2SO4
2
H2S2O8
3
H2S2O7
4
H2SO3
5
अनुत्तरित प्रश्न
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