chemistry 11 - unit 2 test\nmultiple choice. choose the most correct answer. record your answer on the…

chemistry 11 - unit 2 test\nmultiple choice. choose the most correct answer. record your answer on the scantron.\n1. how many of the following are pure compounds: sodium, sugar, oxygen, air, iron\n a. 1\n b. 2\n c. 3\n d. 4\n2. which of the following is an element?\n a. air\n b. water\n c. salt\n d. helium\n e. sugar\n3. an example of a mixture is\n a. hydrogen fluoride\n b. purified water\n c. gold\n d. the air in this room\n e. all of these\n4. an example of a pure substance is\n a. elements\n b. compounds\n c. pure water\n d. carbon dioxide\n e. all of these\n5. water is an example of\n a. a homogenous mixture\n b. a heterogenous mixture\n c. a compound\n d. an element\n e. none of the above\n6. 14k gold can be classified as\n a. an element\n b. a compound\n c. mixture\n d. none of the above\n e. all of the above

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