Oil, petroleum
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D: the composition of the materials that make up the planet
Gas is released by addition of the tablet into water. It is possible to capture the gas emitted and test it - it will be carbon dioxide.
Answer:
Any 4 characteristic of catalyst are:
1. Catalysts remain unchanged at the end of chemical reaction in their mass and structure.
2. They donot start the chemical reaction.
3. They change the rate of the chemical reaction.
4. Catalyst is specific to the chemical reaction. It means that one catalyst can alter the rate of only one chemical reaction.