Chemical reactions and equations
- Why should a magnesium ribbon be cleaned before burning in air?
- What is balanced chemical equation?
- Why should chemical equation be balanced?
- Give an example of double displacement reaction?
- Why does colour of copper sulphate solution change when an iron nail is dipped in it?
- What is exothermic and endothermic reaction?
- Why respiration is considered an exothermic reaction?
- What are the latest techniques used to prevent rancidity?
- On what basis is a chemical equation is balanced?
- Why all decomposition reactions are endothermic reaction?
- When blue salt of copper sulphate is heated it becomes colourless? Why?
- What does a word equation show?
- What is meant by thermal decomposition reaction?
- Explain law of conservation of mass?
- Enlist importance of a chemical equation?
- Define combination reaction?
- What is oxidation?
- What are oxidizing agents?
- What are reducing agents?
- Explain electronic concept of oxidation and reduction?
- What is corrosion? Give 2 examples.
- What is rusting?
- Enlist conditions necessary for rusting?
- State various methods used to prevent rusting?
- Describe rancidity?
- Oil and fat containing food items are flushed with nitrogen. Why?
