Question

There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can however, be divided by electrolysis into two substances which belong to the same class of substances as Y. (a) Identify substances X, Y and Z (b) Give an example of one more substance like X. (c) Which process involves absorption or release of an appreciable amount of energy: formation of substance X or formation of substance Z? Justify.

Answer 1

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Answer 2

Answer:

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