Chemistry Class # 9 Chapter # 1 Updated: 05 May 2020 186 Welcome to your Chemistry Class # 9 Ch # 1 Quiz # 1 1. Hydrogen gas is a mono atomic gas a mixture of hydrogen atoms a diatomic gas with each molecule made up of 2 atoms a diatomic atom made up of two molecules 2. Which one of the following is an example of triatomic molecule? O2 CH4 CO2 NH3 3. The gram molecular mass of HNO3 is: 98 100 63 60 4. Which of these molecule is not a compound? N2O N2 NO NO2 5. Which one of the following is equal to two moles of water (H2O)? 1.084 × 1025 molecules 6.022 × 1023 molecules 1.204 × 1024 molecules 1.806 × 1024 molecules 6. Which one of the following can be broken into simpler substances? Ammonia Oxygen Sulphur iron filling 7. Which one of the following is homogeneous mixture? smoke air fog smog 8. Which one of the following compound has a both empirical and molecular formula identical? benzene (C6 H6 ) hydrogen peroxide (H2 O2 ) water (H2 O) glucose (C6H12 O6 ) 9. A compound contains: different kind of atoms mixed together the same kind of atoms mixed together different kinds of atoms chemically combined together the same kind of atoms chemically mixed together 10. Which one of the following group consists of elements? Mercury, water Ammonia iodine, tin, iron Copper, Aluminum, methane Coal, smoke, fog 11. Anything that has mass and occupies space is called Energy Volume Matter None of these 12. A piece of matter in pure form is called Substance Glass Rubber Metal 13. The shortest name of an element is called Isotope Symbol Abbreviation Valence 14. The symbol of Antimony is Sb Cu Na H 15. The chemical formula of Baking soda is NaOH NaCl HCl NaHCO3 Time is Up! Time's up
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