Question Detail Which metal is heaviest ? osmiummercuryironnickle Answer: Option A Ad Similar Questions : 1. pH of water is 5678 Answer: Option C 2. The chemical used as a fixer in photography is ? sodium thiosulphatesodium sulphateboraxammonium sulphate Answer: Option A 3. Washing soda is ? sodium sulphitesodium bicarbonatesodiun carbonatesodium biosulphite Answer: Option C 4. Rare gases are mono atomicdi atomictri atomicNone of above Answer: Option AExplanation:Rare gases are mono atomic. 5. The Chemical Symbol of Sodium is SoSdNaNu Answer: Option C Read more from - Chemistry Questions Answers