Socorro National High school Socorro, Surigao del Norte 1st Quarter Examination Science - Grade 7 Name: _________________________________ _________________ ________________ Score: ______ Grade/Section: Grade/Sect ion: ____________________ __________________________Date: ______Date: ___
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MULTIPLE CHOICE. Choose the letter of the best answer. Write
your answer on the space provided before each number. _____1. A solution solution in which which no more solid will dissolve is called a. Insoluble c. Solubility b. Saturated d. Soluble _____2. Solution Solution is a homogenou homogenouss mixture. Which of the following following is an example of a solution? a. Mud in a water c. Mango shake b. Ice cream d. Vinegar _____3. What What is the most most comment comment solvent in everyday everyday life? a. Carbon containing chemicals b. Ethanol c. Water d. All of the above above _____4. How How does temperature temperature affect solubility? a. Solubility is not affected by temperature b. Solubility decreases with an increase in temperature c. Solubility increases with an increase in temperature. d. Solubility increases with a decrease in temperature. _____5. The rate of solution solution is a measure measure of how fast a substance substance dissolves. What are the factors that determine the rate of solution? a. Stirring b. Temperature c. Amount solute solute already dissolved dissolved d. Time _____6. What What are the main main factors that affect solubility? solubility? a. Temperature Temperatur e c. Nature of solute and solvent b. Pressure d. All of the above _____7. As the temperature temperature of a liquid solvent increases, increases, the amount of solute that can dissolve in it a. decreases by one degree Celsius for every milliliter of solvent b. increases c. decrease d. remains constant _____8. Which Which of the following following terms terms refers to a solution solution that contains the maximum quantity of solute at a given temperature? a. supersaturated solution b. aqueous solution c. saturated solution d. unsaturated solution _____9. There There are solution which do not not appear in nature instead instead they are made by man. Which is an example of manufactured solution? a. Seawater c. Cologne b. Blood d. Air _____10. In a sugar solution, solution, which component of of the solution is a solute? a. Water c. Salt b. Sugar d. Milk powder _____11. Sophia Sophia wants wants to make a juice after lunch. lunch. What makes makes the powdered juice dissolve faster? a. Add water c. Pour sugar b. Wait until until it will mixed mixed d. Stir very well
_____12. Which Which of the following is an example of suspension? a. Toothpaste c. Salt in a water b. Sand in a water d. Smoke _____13. To determine whether whether the the mixture is a solution or not, not, the following are its characteristics, EXCEPT; a. Clear c. Homogeneous b. Transparent d. Can be filtered _____14. How How will you describe a mixture mixture out of salt and oil? a. The oil can dissolved into the salt. b. The oil can only dissolved a little bit of a salt. c. It becomes a homogenous homogenous solution, the salt is miscible into the oil. d. It becomes a heterogeneous heterogeneous mixture, the salt is immiscible into the oil. _____15. Which Which statement statement describes describes the solute? a. It is the solid formed in solution b. It is the liquid part of the solution c. It is the component of a solution in smaller amount d. It is the component of a solution in bigger amount _____16. 5.45 5.45 g of NaCl NaCl is added added to 100 mL mL of water. water. What is its percentage by mass? a. 2.23% c. 5.23% b. 5.17% d. 4.23% _____17. Which Which value corresponds corresponds to the the pH of pure pure water? a. 7 c. 6 b. 14 d. 3 _____18. Which Which of the following example example is commonly commonly found found in carbonic acid? a. Sour milk c. Vinegar b. Softdrinks d. Fruits _____19. Litmus Litmus paper is an acid and and base indicator. indicator. When red red litmus paper changes to blue, the sample is? a. Neutral c. Basic b. Acidic d. None _____20. Litmus Litmus paper is an acid and and base indicator. indicator. When blue blue litmus paper changes to red, the sample is? a. Neutral c. Basic b. Acidic d. None _____21. Which Which statement statement best describe describe the characteristics characteristics of a base? a. A base is bitter bitter to taste b. A base can neutralize acid c. A base is slippery slippery to touch d. All of the above above _____22. What What type of of substance is a Sodium Chloride? Chloride? c. Salt a. Acid d. Sugar b. Base _____23. Acids Acids can evenly evenly found in our body. An acid to our stomach help digest food that we eat. Which of the following acids contain in our stomach? c. hydrochloric acid a. Nitric acid d. Carbonic acid b. Sulfuric acid _____24. Neutralization Neutralization occurs occurs in our daily daily life activities. When When you are bitten with a bee, the sting is a base. How are you going to treat the sting? a. Apply a week acid solution b. Wash water to the effected part c. Never mind the sting, it will vanish after 5 minutes affected part part d. Apply soap to clean the affected _____25. The The pH scale was was made made and used to distinguish the the acidity and basicity of a substance we use daily. Which of the following is true? a. pH of less than 7 is basic; pH of more than 7 is acidic.
b.
pH of less than 7 is acidic; pH of more than 7 is basic. c. Both a and b d. None of the above _____26.Which one of the following substances is NOT an example of an everyday base? a. Household bleach c. Baking powder b. Oven cleaner d. Lemon juice _____27.Which one of the following substances is NOT an example of an everyday acid? a. Orange juice c. Toothpaste b. Vinegar d. Rain water _____28. If suffering from an upset stomach, you may use a remedy such as Andrews, Gaviscon, Rennie, Alka-Seltzer etc. These are all examples of a. Salts c. Acids b. Pain-killers d. Bases _____29. What method in separating mixture when you are separating sand from gravel? a. Sieving c. Flotation b. Evaporating d. Decantation _____30. How do you classify the following mixtures? (milk, paints, gel, ice cream and mayonnaise) a. All these are elements b. All these are pure substance c. All these are homogenous mixture d. All these are heterogeneous mixture _____31. Which is an example of filtration? a. Straining of mongo seeds through filter b. Removing salt content from salt water c. Separating components of petroleum d. Separating oil from water _____32. Which process can separate sulfur and iron filling when we put together? a. Decantation c. Magnetic separation b. Filtration d. Evaporation _____33. A solid can be separated from a solution using a. Condensation c. Freezing b. Evaporation d. Melting _____34. Which is NOT true about the characteristics of mixture? a. Mixtures are may be homogenous or heterogeneous b. Mixtures are made up of two or more components c. Mixtures may be separated by physical means d. Mixtures may be separated by chemical means _____35. Which statement is TRUE regarding pure substance? a. Pure substance is made up of one kind of molecules b. Pure substance cannot be separated by any physical means c. Pure substance can be elements or compounds d. All of the above _____36. Which ONE of the following is NOT a property of an acid? a. It turns litmus red b. It has a sour taste c. Its pH is greater than 7 d. It reacts with metals to produce hydrogen gas _____37. Two substances physically combined and that appears the same throughout is classified as a. A homogeneous mixture c. An element b. A heterogeneous mixture d. A compound _____38. Which of the following is a way in which elements and compounds are similar? a. Elements and compounds are both pure substances. b. Elements and compounds are both listed on the periodic table.
c.
Elements and compounds are both made up of different kinds of atoms. d. Elements and compounds can both be broken down by physical changes. _____39. What type of substance is always made up of a single type of atom? a. Mixture c. Molecule b. Element d. Compound _____40. What kind of pure substance forms when two elements chemically combine? a. an element c. a mixture b. a compound d. a solution _____41. When materials combine to form a mixture, they a. Keep their original properties. b. React to form a new substance with new properties. c. Combine in a specific ratio. d. Always change their physical state. _____42. One of the following substances is not an element. Which one is it? a. Hydrogen c. Water b. Nitrogen d. Mercury _____43. Which one of the following is a good conductor of electricity? a. Iron c. Wood b. Plastic d. Glass _____44. The property of metal by which it can be drawn into wires is called a. Conductivity c. Ductility b. Malleability d. Decorating _____45. ______________ describes the way a substance reflects light, or SHINES. a. Magnetism c. Luster b. Brittleness d. Ductility _____46. ______________ describes how well the substance can be hammered into sheets. a. Malleability c. Ductility b. Conductivity d. Luster _____47. If a substance breaks easily, it is said to be a. Magnetic c. Brittle b. Conductive d. Ductile _____48.which is the symbol of Pb? a. Mercury c. Lead b. Polonium d. Phosphorus _____49. Which is NOT true about the properties of metal? a. Metals are soft and bend or break easily. b. Metals can be drawn into a wire. c. Metals usually have high melting points. d. Metals are usually silver-grey in color. _____50. Which is true about the properties of a nonmetal? a. Nonmetals are not malleable or not ductile b. Nonmetals are usually good conductors or heat and electricity. c. Both a and b d. None of the above
