SAT Chemistry Practice Test: Introduction 1

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Question 8 questions

Time 5 minutes

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1. A baking powder can carries the statement, "Ingredients: corn starch, sodium bicarbonate, calcium hydrogen phosphate, and sodium aluminum sulfate." Therefore, this baking powder is

A. a compound
B. a mixture
C. a molecule
D. a mixture of elements
E.

2. Which of the following is a physical property of sugar?

A. It decomposes readily.
B. Its composition is carbon, hydrogen, and oxygen.
C. It turns black with concentrated H2SO4.
D. It can be decomposed with heat.
E. It is a white crystalline solid.

3. A substance that can be further simplified using ordinary means may be either

A. an element or a compound
B. an element or a mixture
C. a mixture or a compound
D. a mixture or an atom
E.

4. Chemical action may involve all of the following EXCEPT

A. combining of atoms of elements to form a molecule
B. separation of the molecules in a mixture
C. breaking down compounds into elements
D. reacting a compound and an element to form a new compound and a new element
E.

5. The energy of a system can be

A. easily changed to mass
B. transformed into a different form
C. measured only as potential energy
D. measured only as kinetic energy
E.

6. If the ΔH of a reaction is a negative quantity, the reaction is definitely

A. endothermic
B. unstable
C. exothermic
D. reversible
E.

7. If the graphic representation of the energy levels of the reactants and products in a chemical reaction looks like this:

7-4480_SATChem_Ch1_0020_001.gif

Which of the following statements are true?

I. The activation energy for the forward reaction is represented by the "a" portion.

II. The activation energy for the forward reaction is represented by the "b" portion of the graph.

III. The "a" portion is the energy given off in the forward reaction.

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

8. A substance that can be further simplified by ordinary chemical means may be which of the following?

I. An element or a compound

II. A mixture or a compound

III. An element of a mixture

A. I only
B. II only
C. III only
D. I and II only
E. I, II, and III