| 1 |
Substancs whihc take part in a chemical reaction are called. |
Products
Ractants
Elements
Compunds
|
| 2 |
Thermal decompositionof calcium carbonate produces a gas. |
Oxygen
Carbon di oxide
Nitrogen
Carbon monoxide
|
| 3 |
The reaction between calcium oxide and carbon dioxide to form calcium carbonate is an example of. |
Decomposition reaction
Addition reaction
Acid-Base reaction
Neutralizaion reaction
|
| 4 |
How many oxygen atoms are present in onw molecule of Mg(HCO3)2 |
2
4
6
8
|
| 5 |
Heating of solid potassium chlorate produces a gas. |
Chlorine
Carbon dioxide
Carbon mono oxide
Oxygen
|
| 6 |
The product fo the reaction between zinc and dilute sulphuric acid are. |
Zinc oxide and water
Zinc sulphide and water
Zinc sulphate and hydrogen
Zinc sulphide and hydrogen
|
| 7 |
Carbon burns in air to release energy along with the formation of. |
Carbon dioxide and hydrogen
Carbon monoxide and hydrogen
Carbon di oxide
Carbon dioixe and water
|
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