ASSIGNMENT – 8
CLASS – X
CHEMICAL REACTION & EQUATION

Q.1. What is rancidity? Name two anti oxidants added to food items to prevent rancidity.

Q.2. Name any two ways of preventing rancidity.

Q.3. Define corrosion. What are the different methods used to prevent rusting? Describe them briefly.

Q.4. What is rust. Give its chemical formula.

Q.5. Explain why in moist air, copper corrodes to produce a green layer on its surface.

Q.6. The reaction between Zinc & dilute Hydrochloric acid is:
          a) Combination reaction        
b). Displacement reaction
          c) Decomposition reaction    
d). Double displacement reaction.