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Answers
Answer:
1) The Reaction is Reversible and the production of Ammonia is Exothermic. The catalyst is Actually slightly more complicated Then Pure Iron it has potassium hydroxide added to its promoter a substance that increase efficiency.
2)When iron filings and sulphur powder are mixed and heated they undergo a chemical reaction and form ferrous sulphide (FeS). It is a new substance which has properties entirely different from Fe and S. Therefore, heating of a mixture of iron and sulphur powder is a chemical change.
3)Green substance in producers that traps light energy from the sun, which is then used to combine carbon dioxide and water into sugars in the process of photosynthesis Chlorophyll is vital for photosynthesis, which helps plants get energy from light.
4)Iron sulfide reacts with hydrochloric acid, releasing the malodorous (rotten egg smell) and very toxic gas,hydrogen sulphide. When powdered ferrous sulphide (FeS) is dropped in dilute hydrochloric acid(HCl) , they react, bubbles of gas are seen in the acid.