Write the answers of the following questions: 1. What are the differences between mixed crop and crop rotation
2. Explain noble metals and its uses?
3. What are the major precautions one should follow while taking a
4. Why a mango gets spoilt and rotten after few days but a mango
not spoil for a long period of time?
5. What is the relation between direction of force of friction and
motion?
6. Which force is used to separate solid pollutant particles from