icse 9 chemical changes and reaction 001

                Chemical changes and reactions

Identify the type of chemical change and define the following

1.       A  +   B  →  AB

2.       A   +   BC   →  AC   +  B

3.       AB   +   CD  →   AD  +   CB

4.       A  +   B   →  C  +   D

5.       A   +   B  --------→ C 

Define the following-

1.       Catalyst

2.       Electrolytic decomposition

3.       Neutralization reaction

4.       Precipitation recation

5.       Exothermic reaction

Write the product formed when the following compounds reacts with each other and write the balanced chemical equation for the same

1.       Hydrogen reacts with oxygen

2.       Magnesium oxide reacts with carbon dioxide

3.       Sulphur trioxide reacts with water

4.       Calcium oxide reacts with carbon dioxide

5.       Ammonia reacts with hydrogen chloride

What colored precipitate is formed when-

1.       Lead nitrate and sodium hydroxide reacted together

2.       Ferrous sulphate and sodium hydroxide reacts with each other

3.       Copper sulphate reacts with sodium hydroxide

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