The main gate of ravi's house is developing a powdery brown film of substance which is slowly deteriorating the gate. He asked his friend ramu for help who told him to paint the gate in order to protect it from deteriorating.1. What is the chemical formula of the powdery brown film of the substance?(i) Fe2O3. xH2O(ii) FeO3. xH2O(iii) Fe2O3. xH2O(iv) None of the above2. Which of the following elements undergoes corrosion?(i) Gold(ii) Silver(iii) Platinum(iv) All of the above3. Which of the following is(are) the other ways in which the gate can be protected?(i) Applying the film of grease and oil on the metal surface(ii) Covering metal surface of metal with another metal which is more electropositive(iii) All of the above4. State true or false: Silver sulphide is the chemical name of the compound formed on corrosion of silver.(i) TRUE(ii) FALSE5. State true or false: Conversion of metals into their undesirable compounds (sulphides, carbonates, oxides, etc) by interaction with atmospheric gases and moisture is called as corrosion.(i) TRUE(ii) FALSE