Chemistry Class # 9 Ch # 1 Quiz # 2 Updated: 06 May 2020 497 Welcome to your Chemistry Class # 9 Ch # 1 Quiz # 2 1. Which of the following compounds have the same molecular as well as empirical formula? Acetic acid Benzene Methane None of these 2. Mass number of an atom is denoted by_________ Z P Q A 3. Chemical formula of Magnesia is______ MgO MgS Mg MgNa 4. The formula of Calcium oxide is ______ CaO3 CaO CaS Ca2O 5. The symbol of Tungsten element is ___________ W Sn Ag Na 6. Avogadro’s number is numerically equals to ______________ 6.023 x 1023 6.073 x 1026 6.023 x 1028 6.023 x 1027 7. ___________ are atoms or group of atoms that has a single electron in an outer shell with no charge. Free Radicals Radicals Molecule Compound 8. An atom which have net negative charge is known as Anion Cation Both of them None of these 9. The particle that carries an electrical charge, positive or negative is known as an ion molecule compound none of these 10. Molecular ions are also called Radicals Compounds Elements None of these 11. Which of the following molecule have the same empirical as well as molecular formula Benzene Glucose Acetylene Ammonia 12. The empirical formula of acetic acid is CH2O H2O CH3COOH Fe2O3 13. Molecular formula shows ratio of the atoms present in a molecule Actual number of atoms present in a molecule None of them All of them 14. Molecular formula of Benzene is C6H6 BH N2O C6H12O6 15. The average atomic mass of chlorine is 38.7 a.m.u 34.9 a.m.u 35.5 a.m.u 36.4 a.m.u Time's up
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