Grade 10 SCIENCE (PRETEST)

1. It involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules).

• A. CHEMICAL REACTIONS

• B. PRECIPITATE

• C. CONCENTRATION

• D. STOICHIOMETRY

2. It make use of chemical formulae and symbols to represent chemical reactions.

• A. CHEMICAL REACTIONS

• B. CHEMICAL EQUATIONS

• C. CONCENTRATION

• D. STOICHIOMETRY

3. They are the starting materials in a reaction that undergo a chemical change to form a product.

• A. CHEMICAL REACTIONS

• B. CHEMICAL EQUATIONS

• C. CONCENTRATION

• D. REACTANTS

4. They are insoluble solids that emerge from a liquid solution.

• A. CHEMICAL REACTIONS

• B. CHEMICAL EQUATIONS

• C. PRECIPITATE

• D. REACTANTS

5. It occurs when one reactant breaks down into two or more products.

• A. METATHESIS

• B. DECOMPOSITION REACTION

• C. PRECIPITATE

• D. REACTANTS

6. It refers to the amount of a substance in a defined space.

• A. METATHESIS

• B. DECOMPOSITION REACTION

• C. PRECIPITATE

• D. CONCENTRATION

7. It is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change (chemical reaction).

• A. METATHESIS

• B. STOICHIOMETRY

• C. GEOMETRY

• D. TRIGONOMETRY

8. It is the reactant that is completely used up in a reaction, and thus determines when the reaction stops.

• A. THEORETICAL YIELD

• B. STOICHIOMETRY

• C. LIMITING REAGENT

• D. ACTUAL YIELD

10. Any substance that increases the rate of a reaction without itself being consumed..

• A. CATALYST

• B. THEOROTICAL YIELD

• C. LIMITING REAGENT

• D. ACTUAL YIELD