Question Detail The luster of a metal is due to : high polishinghigh densitychemical inertnesspresence of free electrons Answer: Option D Ad Similar Questions : 1. The substance that contains the maximum amount of nitrogen is ? Ammonium SulphateUreaAmmonium NitrateAmmonium Chloride Answer: Option B 2. Which acid is present in lemon ? marlic acidcitric acidlactic acidtartaric acid Answer: Option BExplanation:citric acid is present in lemon. 3. 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 4. The Chemical Symbol of Sodium is SoSdNaNu Answer: Option C 5. Why is phosphorus kept under water ? to make it wetto make it durablewater forms a protective coating on itto save it from catching fire when exposed to dry air Answer: Option D Read more from - Chemistry Questions Answers