Intellectual Olympiad in Chemistry - 2026 ongoing
1000 ₸
Subject: Chemistry Level: IV (I is easiest, XII is hardest)
Category: student
Question language: English
Questions: 15
Example question: Which species is the conjugate base of H₂CO₃? CO₃²⁻, HCO₃⁻, H₃O⁺, OH⁻