Question

There are three substances X,Y and Z. The substance X does not have a fixed melting point or a boiling point and it still shows individual properties of its constituents. Substance Y is pure substance and occurs in nature as such. The substance Y has a fixed melting and boiling point but it can not 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 substance as Y. (a) What type of substance could X be? Name one substance like X. (b) What type of substance could Y be? Name one substance like Y. (c) What type of substance could Z be? Name one substance like Z. (d) Which process involves absorption or release of an appreciable amount of energy; formation of substance X or formation of substance Z . (e) Name the three groups into which all the substances like Y are divided on the basis of their properties.

Answer 1

Answer:

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