Question Detail Which have maximum number of isotopes ? BromineAluminiumPoloniumCarbon Answer: Option C Ad Similar Questions : 1. What is metallurgy ? process of extracting metal in pure form from its ore.process of creating alloys of metals.process of making metals live long.None of above. Answer: Option A 2. Biogas majorly contains ? EthaneMethaneHydrogenCO Answer: Option B 3. The metal that is used as a catalyst in the hydrogenation of oils is ? PbNi Cu Pt Answer: Option B 4. Permanent hardness of water is due to the presence of ? Magnesium bicarbonateCalcium bicarbonateSodium bicarbonateCalcium sulphate Answer: Option D 5. The chemical used as a fixer in photography is ? sodium thiosulphatesodium sulphateboraxammonium sulphate Answer: Option A Read more from - Chemistry Questions Answers