Board & Competitive Exams (Level-1)
34. What is demineralized water? Is it fit for drinking purposes?
35. Why hard water does not form lather with soap?
36. What are interstitial hydrides? Give three examples.
37. Complete the following reactions
(a) P.010(s) + 6H2O(l) ——
(b) SICI,(0) + 2H2O(l) ——
(c) N3-(s) + 3H,O(1) ►
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Answers
Answer:
34. Demineralised or distilled water is not drinking purposes since it does not contain even useful minerals . Therefore, to make it useful for drinking purposes, useful minerals in proper amounts should be added to demineralised or distilled water. ... Therefore, even demineralized water is fit for drinking purposes.
35.Soap contains sodium salt from stearic acid. In soft water, this sodium dissolves easily, but in hard water, it binds to the minerals and produces insoluble calcium or magnesium stearate, also known as soap scum.
36.Example –1) Lithium Hydride (LiH), Sodium Hydride (NaH), Potassium hydride (KH). 2)Molecular hydride: These kinds of hydrides are formed by electron-rich compounds (generally p-block elements). 3)Interstitial hydride: These are also known as metallic halides. This type of halide is generally formed by d-block elements.
37. sorry but I don't know the ans:-(
Explanation:
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