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Sea water can't be used in boiler. Expla...

Sea water can't be used in boiler. Explain given chemical equations.

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Sea water contains soluble salts of calcium and magnesium, which on boiling change to insoluble salts and get deposited as a crust on the inner of a boiler. This crust acts as a bad conductor of heat and prevent the flow of heat to water. A large quantity of fuel gets wasted.
Chemical Reaction.
`CA(HCO_(3))_(2)overset(Delta)toCaCO_(3)+CO_(2)+H_(2)O`
`Mg(HCO_(3))_(2)overset(Delta)toMgCO_(3)+CO_(2)+H_(2)O`
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SUBHASH PUBLICATION-HYDROGEN-Two marks questions and answers
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  2. Dilute solution of hydrogen peroxide cannot be heated strongly for its...

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  3. Can sodium bicarbonate make water hard ?

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  4. Which of the hydrogen or deuterium undergoes reactions more rapidly an...

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  5. Can we remove completely temporary hardness due to Mg(HCO(3))(2) by bo...

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  6. H(2)O(2) acts as on oxidizing agent as well as reducing agent Why ?

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  7. Why do lakes freeze from top towards bottom ?

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  8. A mixture of H(2)O(2) and hydrzine with copper (II) is used as a rocke...

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  9. Water cannot be used to extinguish petrol fires. Why ?

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  10. What is the volume strenth of H(2)O(2)?

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  11. Hard water is softened before using in boilers. Expain.

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  12. What are the uses of Heavy Water ?

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  13. Show the oxidising property of H(2)O(2) with PbS.

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  14. Discuss the position of hydrogen in the periodic table is not justifie...

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  15. Explain property of H(2)O(2)"with"MnO(4)^(-) in acidic medium.

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  16. How does H(2)O(2) reduces iodine in reducing property ?

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  17. Describe the structure of common from of ice.

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  18. Distinguish clearly between (a) hard and soft water, (b) temporary har...

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  19. What is the structure of H(2)O(2)? Draw a shematic diagram indicating ...

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  20. Sea water can't be used in boiler. Explain given chemical equations.

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