1. When copper vessels are kept over a period of time, these get coated with a green surface. This is due to (i) oxidation of copper (ii) corrosion of copper (iii) reduction of copper (iv) hydrolysis of copper


2. Which is true about corrosion?


3. Which of the following displacement reactions is not possible?


4. The substance which reduces a compound is called


5. Which of the following is not conveyed by balanced chemical reaction?


6. Which is true about respiration? It is a/an


7. Antioxidants are substances which


8. An equation which contains equal number of atoms pf each element on both sides is called


9. A reaction in which an atom or group of atoms present in a molecule is displaced by another atom is called


10. Which of the following is not a redox reaction?


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