Physical Science Pre-test

Which of the following is true about a catalyst?

• A. the product of a combustion reaction

• B. not used up in a reaction

• C. one of the reactants in single-replacement reactions

• D. a solid product of a reaction

Of the alternatives given below, which one describes the limiting reagent in a chemical reaction?

• A. Reactant, in excess

• B. Product, left over

• C. Reactant, used up

• D. Product, used up

Which of the following represents the calculation of quantities in chemical equations?

• A. stoichiometry

• B. percent composition

• C. dimensional analysis

• D. percent yield

An equation is used to calculate the amount of product that will form during a reaction, What is the term used in the value that is being obtained during the experiment?

• A. actual yield

• B. theoretical yield

• C. percent yield

• D. minimum yield

If a student calculates the maximum amount of product that can be obtained in a chemical reaction. What does the student want to determine?

• A. actual yield

• B. mole ratio

• C. primary reactant

• D. theoretical yield

Which of the following reaction will delay the decay of a fruit?

• A. cutting it into small pieces

• B. placing it in the refrigerator

• C. storing it in a warm container

• D. not washing it with water before storage

The following are considered renewable sources of energy except one. Which is the exception?

• A. solar energy

• B. wind energy

• C. fossil fuel

• D. hydropower

Which of the following is used to kill pathogens on surfaces?

• A. Bleach

• B. Disinfectant

• C. Scouring paste

• D. Surfactants

The following are required in the labels of any health care product except one. Which is the exception?

• A. Best before date

• B. List of ingredients

• C. Name and address of manufacture

• D. Logo of manufacturer

What is term used to describe the closest point to the sun in a planet’s orbit?

• A. Aphelion

• B. Equant

• C. Focus

• D. perihelion