Multiple choice general knowledge What is the chemical name of Co(NO3)2 ? Carbon (II) nitro-oxide Cobalt(II) nitrate Cabon nitrate Nitrous (II) carbide Reveal answer Fill a bubble to check yourself B Correct answer Explanation Co(NO3)2 is Cobalt(II) nitrate - Co is Cobalt (not Carbon), NO3 is the nitrate ion, and the Roman numeral II indicates the +2 oxidation state. Options A, C, and D are incorrect chemical names or misinterpret the symbols.