Properties of Matter, Part 3 - Quiz

1.

Which of the following statements is incorrect?

 

a) Compounds are not pure substances

 

b) Elements are pure substances that cannot be broken down

 

c) Pure substances made from more than one element are called compounds

 

d) Some compounds can be decomposed by heating them

2.

A colorless gas relights a glowing splint. The gas is probably:

 

a) Carbon dioxide

 

b) Air

 

c) Hydrogen

 

d) Oxygen

3.

A student placed a small quantity of four different metals—iron, zinc, copper and magnesium—into separate test tubes. 5 ml of dilute hydrochloric acid was added to each tube. Which of the following observations most accurately describes what the student would observe?

 

select

Iron + hydrochloric acid

Zinc + hydrochloric acid

Copper + hydrochloric acid

Magnesium + hydrochloric acid

a)

bubbles

A few bubbles

No observed change

bubbles

b)

No observed change

No observed change

No observed change

No observed change

c)

No observed change

bubbles

bubbles

No observed change

d)

No observed change

No observed change

No observed change

A few bubbles

4.

Gold is found in a metallic form in nature but aluminum is found naturally only as a compound. Which of the following statements best explains this observation?

 

a) Aluminum is more common than gold.

 

b) Gold is found underground and therefore does not combine with air.

 

c) Aluminum is very reactive, gold is not very reactive.

 

d) Electrolysis is used to extract aluminum from its ore.

5.

Which of the following statements about elements is correct?

 

a) Elements are formed from more than one compound.

 

b) Elements are metals.

 

c) All elements dissolve in water.

 

d) Elements cannot be chemically broken down to form other substances

6.

Which of the following lists contain only elements that are magnetic?

 

a) aluminum, iron, cobalt

 

b) aluminum, nickel

 

c) copper, iron and nickel

 

d) iron, nickel

7.

Copper has which of the following properties? It is:

 

a) ductile, brittle and volatile

 

b) a good conductor of electricity, an insulator of heat, shiny

 

c) a good conductor of electricity, ductile, shiny

 

d) odorless, ductile, colorless

8.

A teacher measured the mass of some powdered copper. Its mass was 104.7g. She then heated the powdered copper in a porcelain dish in air. The copper turned black. The teacher measured the mass of the dish and copper again and discovered it was 107.5g.

Which of the following statements is the most likely explanation of this change in mass?

 

a) some of the copper evaporated

 

b) some of the copper reacted with oxygen from the air to form copper oxide

 

c) the copper reacted with the dish to form a new compound

 

d) the copper was converted into an alloy

9.

A students prepared four tubes tubes, A thru D. The contents of the tubes is shown below. After two days one of the nails had a brown coating.

Which tube contained that nail?

 

a)

Tube A

Freshly boiled water

Steel nail

Oil

b)

Tube B

Freshly boiled water

Steel nail

 

c)

Tube C

No water

Steel nail

 

d)

Tube D

No water

Steel nail

Oil


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