Physical Science. 2 nd Benchmark for Semester Secure for Local Use Edition. Name

Size: px

Start display at page:

Download "Physical Science. 2 nd Benchmark for Semester Secure for Local Use Edition. Name"

Evangeline Clark
5 years ago
Views:

1 Name 2 nd enchmark for Semester Physical Science Secure for Local Use Edition 2007 ll rights reserved. This document may not be reproduced by any means, in whole or in part, without the express written permission of Eduware, Inc.

3 o not reproduce Physical Science IRETIONS: The items in this test are based on the North arolina Standard ourse of Study for Physical Science. Proceed with the test on the next page. Page 1

4 o not reproduce Physical Science 1. Which compound could be used to neutralize HNO 3? 5. What is the best method for a student to determine if a substance is an acid or a base? H 2 SO 4 Nal l 2 (SO 4 ) 3 KOH taste it centrifuge it mix it with water use litmus paper 2. What is the total number of electrons in a Mg atom? What has the least affect on the rate of dissolving a solid in water? the crystal size of the solid stirring the solution the water temperature air pressure above the solution 3. What is the total number of valence electrons in an atom of phosphorus? Which equation correctly illustrates the conservation of mass? H 2 + l 2 Hl H 2 + l 2 2Hl H 2 + O 2 H 2 O H 2 + O 2 2H 2 O 4. Which compound contains ionic bonds? N 2 O Na 2 O O O 2 Page 2

o not reproduce Physical Science 8. Given the incomplete equation: 11. What is the name for the compound NH 4 l? 2N 2 O 5 Which set of products completes and balances the incomplete equation?

5 o not reproduce Physical Science 8. Given the incomplete equation: 11. What is the name for the compound NH 4 l? 2N 2 O 5 Which set of products completes and balances the incomplete equation? 2N 2 + 3H 2 2N 2 + 2O 2 nitrogen chloride nitrogen chlorate ammonium chloride ammonium chlorate 4NO 2 + O 2 4NO + SO Which formula represents a substance that contains covalent bonds? LiI 9. Which products are formed when an acid reacts with a base? an alcohol and carbon dioxide al 2 K 2 O an ester and water a soap and glycerine a salt and water O Which is the electron dot symbol for a chlorine atom? 10. When the equation 3Zn + 2H 3 PO 4 Zn 3 (PO 4 ) 2 + xh 2 is correctly balanced, what is the coefficient represented by x? Page 3

6 o not reproduce Physical Science 14. Which equation represents a synthesis reaction? 17. The graph below represents a chemical reaction. Mg + 2Hl Mgl 2 + H 2 KOH + HNO 3 KNO 3 + H 2 O F 2 + ar 2 af 2 + r 2 ao + H 2 O a(oh) Which formula represents carbon tetrachloride? l l 4 How is this reaction is best described? endothermic, because energy is absorbed l 4 ll endothermic, because energy is released exothermic, because energy is absorbed 16. When the equation l(s) + O 2 (g) l 2 O 3 (s) exothermic, because energy is released is correctly balanced using the smallest whole numbers, what is the coefficient of l(s)? Which electron dot diagram represents a molecule of H 2? Page 4

7 o not reproduce Physical Science 19. Salt is often used on sidewalks to help melt accumulated ice. How does the salt melt the ice? 22. What is the charge of an ion that consists of 10 electrons, 11 protons, and 12 neutrons? by increasing the temperature of the ice by raising the melting point of the ice by increasing the temperature of the surrounding air by lowering the melting point of the ice What substance would contain metallic bonds? 20. Given the reaction: Mg(s) + 2 gno 3 (aq) Mg(NO 3 ) 2 (aq) + 2 g(s) What type of reaction is this? single replacement sulfur copper fluorine carbon double replacement synthesis 24. What can be added to an acidic solution to neutralize it? decomposition hydrogen gas 21. n atom of calcium loses 2 electrons in forming a chemical compound. What now is the charge on the resulting calcium ion? table salt an alcohol a base Page 5

8 o not reproduce Physical Science 25. What is the name of P 2 O 5? phosphorus oxide phosphorus -2 oxygen -5 phosphorus pentoxide phosphoric oxide ase your answers to questions 26 and 27 on the data table below which shows the melting and boiling points of common substances. 26. Which substance should be a liquid at 90 degrees? alcohol water nitrogen oxygen 27. s each substance in the table is cooled down from a tempe rature of 200 to -200, what happens to their atoms and molecules? They undergo a physical change as they move faster. They undergo a physical change as they move slower. They undergo a chemical change as they move faster. They undergo a chemical change as they move slower. Page 6

9 o not reproduce Physical Science 28. Which equation is correctly balanced? 30. The table below was compiled from experimental laboratory data. ao + 2H 2 O a(oh) 2 NH 3 + 2O 2 HNO 3 + H 2 O a(oh) 2 + 2H 3 PO 4 a 3 (PO 4 ) 2 + 3H 2 O u + H 2 SO 4 uso 4 + H 2 O + SO Which of these ph indicates the highest level of acidity? t what ph would all three indicators appear as yellow? What type of reaction is shown below? a(lo 3 ) 2 - al 2 + O 2 decomposition double replacement single replacement synthesis Page 7

10 o not reproduce Physical Science 32. Which ph value indicates the most basic solution? The water solution of which of the following substances is the best conductor of electricity? Kl 6 H 12 O 6 O 2 O 33. When ethylene glycol (an antifreeze) is added to water, what happens to the boiling point of the water? It decreases, and the freezing point decreases It decreases, and the freezing point increases 36. If the apparatus illustrated in the diagram below is used in a conductivity test. Substances are placed into the glass to see if the bulb will light up. Which material would be the best conductor of an electric current? It increases, and the freezing point decreases It increases, and the freezing point increases 34. Given the equation: Fel 2 + Na 2 O 3 FeO 3 + Nal When the equation is correctly balanced using the smallest whole numbers, what is the coefficient of Nal? rubbing alcohol distilled water solid salt salt solution Page 8

11 o not reproduce Physical Science 37. What type of reaction is shown below? 39. When the equation NH 3 + Hl NH 4 l synthesis decomposition single replacement exchange of ions a(lo 3 ) 2 al 2 + O 2 is correctly balanced, what is the coefficient in front of O 2? Given: 4 Which diagram represents a mixture? Page 9

12 o not reproduce Physical Science 40. The data table below represents the properties determined by the analysis of substances Q, R, S, and T. Which substance is an ionic compound? Q R S T 41. What is the temperature at which the solid and liquid phases of matter exist in equilibrium called? 43. Given the balanced equation: 2Na + 2H 2 O 2X + H 2 melting point boiling point heat of fusion heat of vaporization What is the correct formula for the product represented by the letter X? NaO Na 2 O NaOH 42. Which is a correctly balanced equation for a reaction between hydrogen gas and oxygen gas? Na 2 OH H 2 (g) + O 2 (g) H 2 O( ) H 2 (g) + O 2 (g) 2H 2 O( ) 2H 2 (g) + 2O 2 (g) H 2 O( ) 2H 2 (g) + O 2 (g) 2H 2 O( ) Page 10

13 o not reproduce Physical Science 44. What is the total number of atoms in one molecule of the compound K 3 PO 4? ase your answer to the following question on the graph below which represents the temperature vs. heat of 2.0 kilograms of a substance originally in the solid state. 45. Element X is in Group 2 and element Y is in Group 17. compound formed between these two elements is most likely to have what formula? X 2 Y XY 2 X 2 Y 7 X 7 Y What is the oxidation number of zinc in ZnS? What is the melting point of the substance? Which pair of atoms will combine with each other forming an ionic bond? and O H and H H and Si a and r Page 11

14 o not reproduce Physical Science 49. The diagram shows a chemical equation with the substances on either side of the equation hidden from view. From the law of conservation of mass, what would be true? the products must weigh more than the reactants energy is neither absorbed nor released by the reaction substances do not change the number of atoms on either side of the equation must be the same 50. ovalent bonds are formed when electrons are 52. Which process occurs during nuclear fission? transferred from one atom to another captured by the nucleus mobile within a metal Light nuclei are forced together to form a heavier nucleus. heavy nucleus splits into lighter nuclei. shared between two atoms n atom is converted to a different isotope of the same element. 51. Which ion has the same electron configuration as an atom of helium (He)? l F K + Li + Transmutation is produced by the emission of alpha particles. End of Physical Science Exam Page 12

Chemistry Final Exam Sample Items

Chemistry Final Exam Sample Items 1. Which best describes the current atomic theory? a. Atoms consist of electrons circling in definite orbits around a positive nucleus. b. Atoms are composed of electrons