9 Chemical Reactions and Equations 1 / 10 Chemical reactions involve the formation of new substances by the process of: Evaporation Condensation Sublimation Combination or decomposition of atoms 2 / 10 A balanced chemical equation shows the: Number of atoms in each element Mass of each element Ratio of reactants and products All of the above 3 / 10 The reactants present at the beginning of a chemical reaction are called: Products Catalysts Reactants None of the above 4 / 10 The products formed during a chemical reaction are shown on the: Left side of the equation Right side of the equation Above the equation Below the equation 5 / 10 In a chemical equation, the '+' sign is used to indicate: Addition of reactants Addition of products Subtraction of reactants Subtraction of products 6 / 10 The number written before a chemical formula to balance the equation is called the: Coefficient Subscript Exponent Index 7 / 10 The arrow in a chemical equation indicates: Conversion of reactants into products Both (a) and (b) Conversion of products into reactants None of the above 8 / 10 In a balanced chemical equation, the total mass of reactants is: Greater than the total mass of products Lesser than the total mass of products Equal to the total mass of products Unrelated to the total mass of products 9 / 10 The law of conservation of mass states that: Mass is always conserved in a chemical reaction Mass is created in a chemical reaction Mass is destroyed in a chemical reaction None of the above 10 / 10 Which of the following is not a chemical change? Rusting of iron Burning of paper Dissolving of salt in water Digestion of food Your score is LinkedIn Facebook Twitter VKontakte