1. Potassium sulfide solution is a _______ mixture.   heterogeneous   homogeneous   2. Which of the following is the smallest part of a compound, whose properties are the same as those of the compound?   Atom   Element   Molecule   Mixture   Hint Half-n-half Clue   3. H2O and FeS represent _______.   mixtures   elements   compounds   Half-n-half Clue   4. Copper sulfate solution can be further subdivided into simpler substances by physical (mechanical) means. Therefore, it is _______.   a mixture   an element   a compound   Half-n-half Clue   5. Which of the following is a pure substance made up of two or more types of atoms or elements?   Mixture   Compound   Element   Half-n-half Clue   6. A mixture of water and oil is _______ in nature.   homogeneous   heterogeneous   7. H2 and Fe represent _______.   compounds   elements   mixtures   Half-n-half Clue