9th Chemistry Chapter 2 04/19/2024 – by freshmcqs 0 Welcome to your 9th Chemistry Chapter 2 Name Email WhatsApp Number 1. Which one of the following results in the discovery of proton? cathode rays canal rays X-rays alpha rays None 2. Which one of the following is the most penetrating? protons electrons neutrons alpha particles None 3. The concept of orbit was used by J.J. Thomson Rutherford Bohr Planck None 4. Which one of the following shell consists of three subshells? O shell N shell L shell M shell None 5. Which radioisotope is used for the diagnosis of tumor in the body? cobalt-60 iodine-131 strontium-90 phosphorus-32 None 6. When U-235 breaks up, it produces: electrons neutrons protons nothing None 7. The p subshell has: one orbital two orbitals three orbitals four orbitals None 8. Deuterium is used to make: light water heavy water soft water hard water None 9. The isotope C-12 is present in abundance of: 96.9 % 97.6 % 99.7 % none of these None 10. Who discovered the proton? Goldstein J. J. Thomson Neil Bohr Rutherford None Please fill in the comment box below.