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Learning Task #1 Chemical Reaction
Directions: Choose the letter of the correct answer and write it in your answer sheet.
1. A Chemists shorthand way of representing chemical reaction.
A. chemical property B. Formula
C. Symbol
D. Equation
2. When acid and base react with each other, it produced water and
A. Salt
C. Fire D. Smoke
3. A process in which one or more substances are converted to one or more different
substances is called chemical?
B. Carbon dioxide
A. Formula
C. Reaction
B. Equation
D. Symbol
Any substance that is present at the start of chemical reaction.
A. Product B. Reactant
C. Symbol
D. Arrow sign
4.
5. The arrow sign in the chemical equation is read as C. will formed
A. added to B. combined with
D. creation of precipitate
6. A number written in the lower right side of the chemical formula, shows the number of atoms of each type in the molecules.
A. coefficient
C. subscript
B. superscript D. parenthesis
7. State that the total mass of the reactant must be equal to the total mass in the product.
A. Law of gravity B. Law of reflection
C. Law of interaction D. Law of conservation of mass
8. A numerical number attached in front of the chemical formula, denotes the number of
molecules or mole in a compound.
A. coefficient B. subscript
C. superscript
D. molecules 9. A method used to balance out the number of each element in both side of the
equation.
A. Redox reaction
C. Inspection method
B. Valence number
D. None of the above
10. It is used to form subgroups of atoms within a molecule.
A. coefficient
B. subscript
C. superscript D. parenthesis