2016 Phys PRACTICE Sci Quiz 1

Transcription

1 2016 Phys PRTIE Sci Quiz 1 Name: ate: 1. mixture of crystals of salt and sugar is added to water and stirred until all solids have dissolved. Which statement best describes the resulting mixture?. The mixture is homogeneous and can be separated by filtration.. The mixture is homogeneous and cannot be separated by filtration. 4. When sugar is dissolved in water, the resulting solution is classified as a. homogeneous mixture. heterogeneous mixture. homogeneous compound. heterogeneous compound. The mixture is heterogeneous and can be separated by filtration.. The mixture is heterogeneous and cannot be separated by filtration. 5. Which statement is an identifying characteristic of a mixture? 2. Which statement describes a chemical property of the element iodine?. Its crystals are a metallic gray.. It dissolves in alcohol.. It forms a violet-colored gas.. mixture can consist of a single element.. mixture can be separated by physical means.. mixture must have a definite composition by weight.. mixture must be homogeneous.. It reacts with hydrogen to form a gas. 3. n example of a heterogeneous mixture is. soil. sugar. carbon monoxide. carbon dioxide 6. If a student pours a mixture of sand and salt water through a filter paper into a beaker, what will be found in the beaker after filtering?. salt, only. sand, only. salt and water. salt and sand page 1

2 7. Given: = particle X = particle Z Which diagram represents a mixture? 10. ase your answer(s) to the following question(s) on the information below. student prepared two mixtures, each in a labeled beaker. Enough water at 20. was used to make 100 milliliters of each mixture..... lassify each mixture using the term homogeneous or the term heterogeneous. Mixture 1: Mixture 2: 8. Which of these contains only one substance?. distilled water. sugar water. saltwater. rainwater 11. Which element would have properties characteristic of both a metal and a nonmetal?. g. K. Si. Xe 9. ase your answer(s) to the following question(s) on the diagram below concerning the classification of matter. 12. Which is the most likely ph for a solution of a weak acid? What type of mixture is represented by X? page Phys PRTIE Sci Quiz 1

3 13. Which ph value indicates the most basic solution? s the molecules of water begin to slow down they go into a phase where they are no longer able to easily move past each other. The water is passing through a phase change and will. remain a mixture.. remain a compound.. become an element. 14. n acidic solution could have a ph of. become a compound student dissolves a substance in water, tests the resulting solution, and observes that red litmus paper turns blue. ased on this result, the solution is. organic. inorganic. basic. acidic 18. Steel is a metal that is made from iron and carbon. uring the steel making process, iron and carbon are melted, blended together, and then allowed to harden into a solid. The iron and carbon do not chemically react with each other. fter steel was made, 20 samples were taken from one piece and tested. Each sample contained 98% iron and 2% carbon. Which of the following terms best describes steel?. element 16. Which characteristic describes most nonmetals in the solid phase?. good conductors of electricity. compound. homogeneous mixture. heterogeneous mixture. good conductors of heat. malleable. brittle page Phys PRTIE Sci Quiz 1

4 19. When magnesium (Mg) metal is burned in the presence of oxygen (O 2 ), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is 21. diagram of the periodic table of the elements is shown below.. a solution.. a mixture.. a compound.. an element. In which region of the table would nonmetals be found? Which class of elements best conducts electricity? 20. What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (r) have in common?. metals. nonmetals. semimetals. noble (inert) gases. They are noble (inert) gases.. They are nonmetals.. They have the same thermal conductivity.. They have the same number of protons. 23. opper (u) reacts with oxygen (O) to form copper oxide (uo). The properties of uo are most likely. different from copper or oxygen.. similar to both copper and oxygen.. similar only to copper.. similar only to oxygen. page Phys PRTIE Sci Quiz 1

5 24. Which of the following is best classified as a compound? 26. What is the smallest unit of a chemical compound that still has the properties of that compound?. Helium (He), because it contains only one type of atom. Oxygen (O2), because it contains two of the same type of atoms. a nucleus. a molecule. an element. an atom. arbon dioxide (O2), because it contains two different types of atoms. Manganese (Mn), because it contains a metal and a nonmetal 27. Which of the following explains why saltwater is considered a mixture?. It is composed of one element.. It is composed of one compound. 25. The two beakers below contain pure water.. It is composed of two or more substances and has new chemical properties.. It is composed of two or more substances that retain their own chemical properties. Which of the following properties is the same for both of these samples?. mass. weight. volume. boiling point 28. Which of the following elements is a metalloid?. magnesium. silicon. phosphorus. cobalt page Phys PRTIE Sci Quiz 1

6 29. Several properties for zinc (Zn) are listed below: brittle at room temperature, but malleable between 100 and 150 bluish-white in color burns in air at high temperatures, giving off zinc oxide (ZnO) gas conducts heat and electricity sinks in water reacts with acids and bases exposed surfaces tarnish in moist air a) Identify two physical properties of zinc from the list. Explain why the properties you identified are physical properties and not chemical properties. b) Identify two chemical properties of zinc from the list. Explain why the properties you identified are chemical properties and not physical properties. 31. Which of the following elements has both metallic and nonmetallic properties?. r. Ge. Mg. S 32. The element silicon is best used for which purpose?. as a container to keep coffee hot. as a semiconductor in computer chips. as a material to make airplane frames. as a malleable material for coins and jewelry 30. The table below provides some information about an unidentified element. Physical Properties: shiny silver-colored solid easily flattened with small hammer denser than water has 4 valence electrons hemical Properties: does not react with sodium reacts slowly with oxygen 33. Which is the best example of a pure substance?. peanuts. milk. gold. air ased on this information, the unidentified element is best classified as which of the following?. a metal in group 1 (1). a metal in group 14 (4). a nonmetal in period 4. a metalloid in period Which pair of elements is both malleable and able to conduct heat?. bromine and silver. iodine and neon. iron and bromine. silver and iron page Phys PRTIE Sci Quiz 1

7 35. The smallest particle of any element that still has the properties of that element is called. an atom.. a compound.. a solution.. a mixture. 37. Which of these elements would most likely be a shiny, gray-colored solid at room temperature, conduct electricity, and dent when hit with a hammer?. aluminum. argon. chlorine. sulfur 36. Which of these diagrams most likely represents the chemical structure of a substance that is a pure element? uring a lab investigation a scientist heats a solid substance. The scientist observes that the solid has two different melting points. The scientist is able to separate the two resulting liquids. Which statement best classifies the original solid substance?.. It was an atom.. It was a mixture.. It was an element.. It was a compound.. page Phys PRTIE Sci Quiz 1

8 Problem-ttic format version c Educide Software Licensed for use by Kirsten Jaster Terms of Use at Phys PRTIE Sci Quiz 1 09/01/ cceptable responses include, but are not limited to: heterogeneous nonuniform 10. Mixture 1: homogenous Mixture 2: heterogeneous