Question Detail What nucleus of atom contains ? protonselectronselectrons and protonsprotons and neutrons Answer: Option D Similar Questions : 1. Which acid is present in lemon ? marlic acidcitric acidlactic acidtartaric acid Answer: Option BExplanation:citric acid is present in lemon. 2. The metal that is used as a catalyst in the hydrogenation of oils is ? PbNi Cu Pt Answer: Option B 3. What is used to avoid melting of ice ? GelatineButaneMethaneAny acid Answer: Option A 4. What nucleus of atom contains ? protonselectronselectrons and protonsprotons and neutrons Answer: Option D 5. Air contains maximum amount of oxygennitrogenhydrogencarbon dioxide Answer: Option B Read more from - Chemistry Questions Answers