Is Matter Around Us Pure?

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1. When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C.The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product F.which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.