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Carbon-Introduction

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

The number of protons that carbon has is:

a)

5

b)

6

c)

7

d)

8

2.

In the free state, carbon exists as:

a)

CO2

b)

Na2CO3

c)

coal

d)

methane

3.

Hydrocarbons are compounds containing:

a)

hydrogen and carbon

b)

carbon and water

c)

hydrogen and carbon compounds

d)

hydrogen and water

4.

Washing soda is:

a)

Na2CO2

b)

NaHCO4

c)

NaHCO3

d)

Na2CO3

5.

A gaseous compound of carbon that is an air pollutant is:

a)

CS2

b)

CO

c)

CO3

d)

CH3

6.

Carbon is:

a)

monovalent

b)

divalent

c)

trivalent

d)

tetravalent

7.

When CO2 is dissolved in water, it forms:

a)

H2CO3

b)

HCO3

c)

H2CO2

d)

H2CO4

8.

Natural gas is mainly composed of:

a)

butane

b)

ethane

c)

methane

d)

propane

9.

Marble is:

a)

calcium carbonate

b)

calcium bicarbonate

c)

calcium oxide

d)

calcium hydroxide

10.

Vinegar is:

a)

malic acid

b)

citric acid

c)

carbonic acid

d)

acetic acid