Question Detail What nucleus of atom contains ? protonselectronselectrons and protonsprotons and neutrons Answer: Option D Ad Similar Questions : 1. Petroleum is found in ? Marshy landMetamorphic rocksIgneous rockSedimentary rocks Answer: Option D 2. The metal that is used as a catalyst in the hydrogenation of oils is ? PbNi Cu Pt Answer: Option B 3. Brass is an alloy of ? Copper and TinCopper and ZincCopper and AluminiumIron and Copper Answer: Option B 4. Which of the following is produced during the formation of photochemical smog ? Nitrogen OxidesHydrocarbonsMethaneOzone Answer: Option D 5. Due to rusting the weight of iron DecreasesIncreasesRemains the sameUncertain Answer: Option B Read more from - Chemistry Questions Answers