Question

Answer these questions,
1. Name the catalyst that is used in the preparation of oxygen.
2. Is oxygen soluble in water?
3. Name the by-products that are released during respiration.
4. Is combustion a chemical reaction?
5. Different substances have different ignition temperatures. True or false?
6. Name the compound formed in the process of rusting.​

Answer 1

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• 1. Manganese dioxide is used in the preparation of oxygen from hydrogen peroxide.

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• 2. Oxygen is relatively insoluble in water, its solubility being only 264 µM at 25 °C.

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• 3. The end products of anaerobic respiration are Lactic acid or ethanol and ATP molecules. During the process of Anaerobic Respiration in prokaryotes, there is a breakdown of glucose to produce energy for cellular activities.

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• 4. Yes, Combustion is a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame.

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• 5. True.

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• 6. The exposure of iron (or an alloy of iron) to oxygen in the presence of moisture leads to the formation of rust. Iron(III) oxide or ferric oxide, where the iron atom exhibits an oxidation state of +3. The chemical formula of this compound is Fe2O3.

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ㅤHope it Helps uh Dear!! ❤

Answer 2

Answer:

1. Magnesium oxide

2. Soluble at high pressure

3. During respiration CO2, H2O and energy are produced

4. Combustion is a chemical reaction

5. True

6. Ferric oxide