Multiple Choice. Write the letter of the correct answer before each number. 1. Seawater is a mixture. Which of the following best describes a mixture? A. All molecules are of the same kind. B. The molecules are not of the same kind. C. It is cannot be broken down into any other substances D. It is made up of two or more elements that are chemically combined. 2. Gold is to element while A iron is to compound B. halo-halo C. softdrinks D water 3. Which statement is TRUE regarding puro substances? A. Pure substances have definite boiling and melting points. B. Pure substances maybe homogeneous or heterogeneous C. Pure substances are physical combinations of two or more elements D. Pure substances can be further broken down into simpler substances 4. Which of the following is a compound? 1. gold 2. aluminum A 1 and 2 B. 2 and 3 3. water vapor C. 3 and 4 4. ethanoi D. 2 and 4 5. Which of the following is NOT a characteristic of a mixture? A. It may be homogeneous or heterogeneous. B. Its components are present in any proportion. C. It is a physical combination of two or more substances D. Its components can be separated by simple chemical processes. 6.At sea level,an odorless and colorless material boils at 100°C and freezes at 0°C. What inference can be drawn from this observation? A.The materials is heterogeneous B.The material is a homogeneous mixture C.The material is a mixture D.The material is a pure substance 7.Sugar is heated in a test tube until it is completely charged into a black mass and droplets of water. This experiment indicates that sugar is_____. A.an element B.a compound C.a heterogeneous mixture D.a homogeneous mixture​