I. ANSWER IN ONE WORD OR ONESENTENCE: (4X1=4)1. Grains should be first dried in the sun before storage. Why? 2.Which is the hardest coal? Give the percentage of carbon content in it. 3. Define ignition temperature.4. What is noise pollution? II. ANSWER IN TWO OR THREE SENTENCES: (5X2=10)5. Both phosphorus and potassium are stored in different media. Which are the media used for this? How would you provide an appropriate reason for this?6. Write any two ways by which you can take care of your eyes. 7. A yellow powder ‘X’when burned produces a bright blue flame with a suffocating gas that turns wet blue litmus paper red. a. Analyze the reactionand identify the element ‘X’. Can this element be used to draw wires? b. Write the equation involved in the reaction when it is burned in the presence of oxygen.8. It is observed thatpetrol pumps and airports usefoam fire extinguishers, instead of soda-acid fireextinguisher. How would you support this statement with reason?