Gases and Water

Question 1

Acidic

Answer 1

Red

Question 2

Alkaline

Answer 2

Blue

Question 3

A base is anything that

Answer 3

Neutralises an acid

Question 4

Carbon burns in oxygen to give

Answer 4

Carbon dioxide

Question 5

Equation for the reaction

Answer 5

Carbon + oxygen –> Carbon dioxide
C + O –> Co
2 2

Question 6

Metals react with oxygen to produce …

Answer 6

oxides which are solids

Question 7

Name of the gas | Formula | % in air 
Nitrogen              |               |
Oxygen               |                |
Argon                  |                |
Carbon dioxide   |                |

Answer 7

Name of the gas | Formula | % in air
Nitrogen | N | 78%
| 2 |
Oxygen | O | 21%
| 2 |
Argon | Ar |0.9%
Carbon dioxide | Co |0.04%
2 |

Question 8

Reacting metals with non metals
Burns with …
Name of compound that is produced is …
The equation for the reaction is magnesium + oxygen –> (the name). (The equation).
If water is added to the (answer to previous) and then some universal indicator solution, the colour turns _________ - ________

Answer 8

Bright white light 
Magnesium
Magnesium oxide     2Mg + O  --> 2 MgO
                                                2
Blue -alkaline