17 Questions
Match the following elements with their atomicity:
Copper (Cu) = Monoatomic Oxygen (O2) = Diatomic Ozone (O3) = Polyatomic Gold (Au) = Monoatomic
Match the following properties with the correct type of element:
Malleable, Ductile, Conducts electricity = Metals Not malleable or ductile, Poor conductor of electricity = Non-metals Have properties of both metals and non-metals = Metalloids Good conductors of heat and electricity, Malleability varies = Metals
Match the following terms with their corresponding definitions:
Graphite = Consists of a hexagonal lattice of carbon atoms Fullerenes = Carbon atoms bonded in spherical, tubular, or ellipsoidal formations Atomicity = Number of atoms present in the molecule of an element Metals = Elements that are malleable, ductile, and conduct electricity
Match the following statements with the correct category of elements:
Solid at room temperature: Sodium, Carbon, Iron = Metals Liquid at room temperature: Mercury, Bromine = Non-metals Gas at room temperature: Oxygen, Hydrogen = Non-metals Some elements can be solid, liquid or gas at room temperature = Metalloids
Match the following metals with their properties:
Gold = Malleable and ductile Silver = Best conductor of heat and electricity Aluminum = Solid metal used in electrical wiring Mercury = Liquid metal that is a poor conductor of heat
Match the separation technique with its description:
Filtration = Separates solid particles from a liquid based on inability to pass through filter paper Centrifugation = Uses centrifugal force to separate particles based on size, shape, viscosity, and density Evaporation = Involves heating a solution to evaporate the solvent, leaving behind solid substances Crystallization = Cooling a hot concentrated solution to obtain crystals
Match the application with the correct usage of centrifugation:
Dairy Industry = Separating cream from milk Juices Production = Controlling pulp in juices Essential Oils Extraction = Extracting essential oils Starch and Yeast Separation = Separating starch and yeast
Match the material with the correct application of chromatography:
Paper Chromatography = Based on the fact that two or more substances are soluble in a solution in very small quantities Ink Separation = Used for separating dye from ink Seawater Extraction = Cooling a hot concentrated solution to obtain crystals Pigment Separation = Inspired by the separation of pigments into colorful bands
Match the item with its correct description in separation techniques:
Magnet = Used to separate iron filings from sand Sieves or Hand-Picking = Separates larger particles from smaller ones Solid from Liquid Mixtures = Utilizes filtration technique for separating solid particles from liquids Chromatography = Technique of separating dissolved solids based on their solubility in a solution
Match the component with its movement during centrifugation:
Denser Components = Pushed outward away from the center Less Dense Components = Move inward toward the center Oil in Water Suspension = Utilized in dairy industry for cream separation Curds and Whey = Separated using centrifugation technique
Match the solid substance with its method of separation:
Salt from Seawater = Obtained through crystallization by cooling a hot concentrated solution Insoluble Solids from Liquids = Separated using filtration where solid particles remain on filter paper Iron Filings from Sand = Separated using a magnet to attract the iron filings Dye from Ink = Achieved through evaporation by heating the solution until solvent evaporates
Match the following separation techniques with the correct description:
Using a Suitable Solvent = Separating a soluble component from an insoluble component by using a solvent Sublimation = Changing a solid directly into vapors on heating and obtaining the solid component by cooling the vapors Magnetic Separation = Separating a mixture containing iron by using a magnet Distillation = Separating components based on their boiling points by heating and condensing
Match the following substances with their ability to undergo sublimation:
Ammonium chloride = Undergoes sublimation when heated Iodine = Undergoes sublimation when heated Camphor = Undergoes sublimation when heated Sugar = Does not undergo sublimation when heated
Match the following substances that can be separated by sublimation:
Naphthalene and common salt mixture = Can be separated by sublimation Sugar and sand mixture = Cannot be separated by sublimation Iron filings and sulphur powder mixture = Cannot be separated by sublimation Ammonium chloride and water mixture = Cannot be separated by sublimation
Match the following substances with their ability to be separated by magnetic separation:
Iron filings and sulphur powder mixture = Can be separated by magnetic separation Sugar and water mixture = Cannot be separated by magnetic separation Salt and pepper mixture = Cannot be separated by magnetic separation Oil and vinegar mixture = Cannot be separated by magnetic separation
Match the following terms with their corresponding actions in separating mixtures:
Sublime = 'Sublime' is the solid substance that undergoes sublimation Sublimate = 'Sublimate' is the solid substance obtained by cooling the vapors after sublimation Soluble = 'Soluble' refers to a component that dissolves in a particular solvent Insoluble = 'Insoluble' refers to a component that does not dissolve in a particular solvent
Match the following substances with their primary method of separation from mixtures:
Naphthalene = Can be separated by sublimation Iron filings = Can be separated by magnetic separation Water = Used as a solvent for separating soluble components Sand = Insoluble component that remains after using a suitable solvent
Test your knowledge on the characteristics of pure substances including homogeneity, fixed melting and boiling points, and uniform composition of elements and compounds.
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