1) Which of the following statements best describes organic compounds? a) Organic compounds are compounds that contain carbon and oxygen only b) Organic compounds are compounds that are produced by living things 2) Why is mole concept important? a) It is useful when converting between grams and atoms or molecules. b) It gives us a convenient way to express large numbers c) All of the above 3) Which atomic model is proposed by Schrodinger? a) nuclear model b) quantum mechanical model 4) What will most likely happen to a non-metallic atom after ionic bonding? I. It forms a cation II. It forms an anion III. It becomes stable IV. It becomes unstable a) I & II b) II & III 5) A gasoline boy was being scolded by his store manager for smoking in the vicinity of the gasoline station. Why do you think the manager scolded his employee? a) because gasoline is volatile b) because gasoline is flammable 6) Which electron transition results in the emission of energy? a) 3p to 3s b) 3p to 4p 7) People usually use hydrogen peroxide (H2O2 Molar Mass = 34.02 g/mole) to clean their wounds. If Cheska used 1.0 g of H2O2 to clean her wound, how many mole of H2O2 did she use? a) 0.035 mole b) 0.029 mole 8) The symbol “n” in the Bohr theory of atomic structure refers to a) the number of electron in an energy level b) the total energy of the atom 9) If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom? a) 6 b) 10 10) Why can metals be hammered without breaking? a) They are ductile. b) They are malleable. 11) Which of the following pairs of organic compounds is highly flammable? a) liquefied petroleum gas, kerosene b) water, ethyl alcohol 12) How can the knowledge about mole be useful for environmentalists? a) Mole concept can be used in environmental monitoring. b) Mole concept can be used in quantifying the amount of pollutant-particles released in the atmosphere. 13) How does ionic bonding take place? a) Two non-metallic elements of different kinds form strong forces of attraction. b) A non-metallic element like fluorine is attracted to a metallic element like sodium. 14) What kind of particle is produced after covalent bonding? a) atom b) molecule 15) The presence of SO2 in the atmosphere causes acid rain. How many percent of sulfur is present in SO2 (Molar Mass =64.07g/mole)? a) 40.00% b) 49.95% 16) What is the common use of ethyne? a) artificial ripening agent b) fertilizer 17) What kind of bond will result when two identical non-metallic atoms combine? a) ionic bond b) nonpolar covalent bond 18) When does covalent bonding take place? a) It takes place when atoms share electrons with one another. b) It takes place when the attraction between atoms is strong. 19) Which of the following type of bonds will have the highest electrical and thermal conductivity? a) ionic bond b) metallic bond 20) Choose 2 elements that would likely form an ionic bond among the following elements: Li, Si, F, Ne a) Li and Si b) Li and F 21) In cold areas, many fish and insects, including the common housefly produce large amounts of glycerol (C3H8O3 Molar Mass = 92.11 g/mole) to lower the freezing point of their blood. How many percent of oxygen is present in glycerol? a) 52.11% b) 50.11% 22) How is the bond in Br2 different from the bond in MgF2? a) The bond in Br2 is metallic while the bond in MgF2 is covalent. b) The bond in Br2 is covalent while the bond in MgF2 is ionic. 23) Element X belongs to Group 1. Which of the following best describes element X? a) low electronegativity b) high ionization energy 24) Why do atoms react with one another to form chemical bonds? a) to attain stability b) to form compounds 25) What is the maximum number of bonds can a carbon atom form? a) 2 b) 4 26) Nitrogen (N) belongs to family 5A and it is diatomic. How many nonpolar covalent bonds will there be in N2 molecule? a) 1 b) 3 27) Which of the following sublevels is correctly designated? a) 2p6 b) 3f9 28) Honey is applying something to the ball bearings of the wheels of her bicycle so that friction will be minimized. Which of the following materials do you think she is using? a) lubricating oil b) isopropyl alcohol 29) How many orbital are in the third principal energy level? a) 3 b) 6 30) How do carbon atoms form many organic compounds? a) By attracting other elements toward themselves to form the bonds b) By forming many bonds with other carbon atoms and other elements 31) How many particles are equal to 1 mole? a) 6.02 x 1024 particles b) 6.02 x 1023 particles 32) Which hydrocarbon compound has a triple bond in the molecule? a) octane b) ethyne 33) To which group of hydrocarbon does the molecule with the structure belong? a) alkene b) alkyne 34) Which alkane will most likely have a very low boiling point? a) propane b) pentane 35) What is the common use of methane? a) disinfectant b) fuel 36) Which of the following units is used in expressing the amount of substance in terms of the number of particles? a) liter b) mole 37) Methane is a component of natural gas. What is the common use of methane? a) disinfectant b) fuel 38) What happens to the boiling point of hydrocarbon compounds when the number of carbon atoms increases? a) increases b) decreases

Chemistry

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?