Free Printable Chemistry Review 1

1.

You are given a mystery object in science class. Your teacher asks you to determine if your object is more or less dense than water. You place the object in the water and it sinks. What statement would best describe this situation?

a)

The mystery substance is denser than water.

b)

Water is denser than the mystery substance.

c)

They both have the same mass.

d)

The mystery substance must be hollow.

2.

Which of the following describes a precipitate?

a)

a new liquid forms when a solid reactant is heated and melts

b)

a new solid product formed from two aqueous reactants

c)

a new gas forms when a solid is dissolved in a liquid

d)

bubbles form when two aqueous reactants are mixed

e)

a new solid forms when an aqueous reactant freezes

3.

All of the following are indicators of a chemical reaction except one. Which one is NOT an indicator that a chemical reaction has taken place?

a)

the production of heat or light

b)

a color change

c)

the production of gas bubbles

d)

the dissolving of one substance in another

e)

an odor change

4.

Four students performed four different investigations by combining different substances. Which of the observations is most indicative of a chemical reaction?

a)

investigation 1

b)

investigation 2

c)

investigation 3

d)

investigation 4

5.

In a container, a solid consisting of clear crystals is combined with a blue liquid and the following observations are obtained.

Of the four observations listed, how many indicate a new substance was formed?

a)

1

b)

2

c)

3

d)

4

6.

An aqueous, cloudy, white baking soda solution was combined with solid, powdery, white calcium chloride. Once combined, the temperature of the test tube increased and bubbling occurred creating an aqueous, cloudy, white solution with a flaky, white solid. What indicators of a chemical change are present?

a)

energy change

b)

Color change

c)

gas bubbling

d)

precipitate formation

7.

Food that rots in the fridge is what type of change?

a)

chemical

b)

physical

8.

When one substance reacts with another it is a ____ change.

a)

chemical

b)

physical

9.

If you put your skittle candy on a plate with water the color will come off. What type of change is this?

a)

chemical

b)

physical

10.

Using a hot plate to heat a solid until it changes color and releases an odor would provide evidence of a chemical change because the particles cannot be changed back. This is what type of change?

a)

chemical

b)

physical

11.

Substances that change in appearance but not in composition are an example of a ___ change.

a)

chemical

b)

physical

12.

When two substances are combined and create their own heat and light, this is a _______ change.

a)

chemical

b)

physical

13.

Temperature changes can cause a ____ change.

a)

chemical

b)

physical

14.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

15.

How many Oxygen are in H₂O?

a)

1

b)

2

c)

0

d)

4

16.

How many Magnesium are in 10MgCl₂?

a)

10

b)

5

c)

20

17.

2H₂ + O₂ ----> 2H₂O What is the product?

a)

------>

b)

2H₂O

c)

2H₂+ O₂

18.

2H₂ + O₂--------> 2H₂O What are the reactants?

a)

----->

b)

2H₂O

c)

2H₂ +O₂

19.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

20.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

21.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

22.

Number of N in (NH₄)₂CrO₄

a)

1

b)

2

c)

8

d)

16

23.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

24.

A subscript is the small number below a(n) (a) that tells the number of (b) of that element.

Choose from the below words

element symbol; atoms

atom; element symbol

subscript; protons

compound; elements

25.

$C\ +\ O_2\ \ \rightarrow\ \ CO_2$

a)

Balanced

b)

Unbalanced

26.

$6C\ \ +\ \ 6H_2O\ \ \rightarrow\ \ C_6H_{12}O_6$

a)

Balanced

b)

Unbalanced

27.

$Na\ \ +\ \ Cl_2\ \ \rightarrow\ \ \ NaCl$

a)

Balanced

b)

Unbalanced

28.

$CH_4\ \ +\ \ O_2\ \ \ \rightarrow\ \ \ CO_{2\ \ }+\ \ 2H_2O$

a)

Balanced

b)

Unbalanced

29.

$CO_2\ \ +\ \ H_2O\ \ \rightarrow\ \ H_2CO_3$

a)

Balanced

b)

Unbalanced

30.

$2HCl\ \ +\ CaCO_3\ \ \rightarrow\ \ CaCl_2\ \ +\ \ CO_2\ \ +\ \ H_2O$

a)

Balanced

b)

Unbalanced

31.

$2KI\ \ +\ \ Cl_2\ \ \rightarrow\ \ 2KCl\ +\ I_2$

a)

Balanced

b)

Unbalanced

32.

$2C_2H_6\ \ +\ \ O_2\ \ \rightarrow\ \ 4CO_2\ \ +\ 3H_2O$

a)

Balanced

b)

Unbalanced

33.

$SO_3+H_2O\ \ \rightarrow\ \ H_2SO_4$

a)

Balanced

b)

Unbalanced

34.

$Ca\ \ +\ \ HCl\ \ \rightarrow\ \ CaCl_2\ \ +\ \ H_2$

a)

Balanced

b)

Unbalanced

35.

$Fe+O_2\ \ \rightarrow\ \ Fe_2O_3$

a)

Balanced

b)

Unbalanced

36.

All of these properties describe metals except...

a)

malleable

b)

conductors

c)

brittle

d)

shiny

37.

One property of a nonmetals is that it is a good conductor of electricity?

a)

true

b)

false

38.

All of the following would classify an element as a metal except?

a)

Dull

b)

Luster

c)

Malleable

d)

Hard

39.

Non-metals are good conductors of heat and electricity.

a)

TRUE

b)

FALSE

40.

Which of the following properties refers to the ability of metals to be drawn into wires?

a)

A. malleability

b)

B. compressibility

c)

C. ductility

d)

D. luster

41.

Metals appear to the _______ of the dark ziz-zag line on the periodic table.

a)

A. right

b)

B. middle

c)

C. left

42.

Anytime you see the word SEMICONDUCTOR - what substance do you have?

a)

Metal

b)

Nonmetal

c)

Metalloid

43.

If a material can easily be drawn into the shape of a wire, it is

a)

Ductile

b)

Magnetic

c)

Malleable

d)

Reactive

44.

Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon?

a)

Metal

b)

Nonmetal

c)

Metalloid

d)

Pretty

45.

ductile means...

a)

can be made into wire

b)

can be bent or hammered

c)

can light up a light bulb

d)

it's shiny

46.

Which group of elements could have the characteristic of brittle?

a)

Metal

b)

Nonmetal

47.

Luster is ___________

a)

A. the way light is reflected off a surface.

b)

A. how well a piece of matter conducts electricity.

c)

A. the capability of being drawn out into thin wires or threads.

d)

A. the capability of being hammered out thin.

48.

Nonmetals are ________ compared to metals.

a)

highly conductive

b)

brittle

c)

ductile

d)

non-conductive

49.

Conductivity is the ability to

a)

reflect light from a lustrous surface

b)

transfer thermal and electrical energy

c)

exist as a solid, liquid, or gas

d)

be hammered into thin sheets

50.

Which elements are found on the right side of The Periodic Table?

a)

Metals

b)

Nonmetals

c)

Metalloids

d)

Water

Chemistry Review 1

Total questions: 50

Worksheet time: 1hrs 6mins

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