Question

(1) the process of heating
an ore below it's melting point in the absence of air to get melting oxide.

(2) a compound which conduct electricity in the molten state or when dissolved in water

(3) the process of formation of a solid when solution are mixed

(4) a phenomenon by which hydrated salts, on exposure to dry air, lose their water of crystallisation and crumble to powder​​

Answer 1

Answer:

(1)Calcination is the process in which the ore is heated below its melting point in absence of air.

(2)Ionic compounds

(3)Solid solutions may be distinguished as substitutional, when the volume of constituent elements is similar, and interstitial, when a volume difference (size factor) higher than ∼15% is observed. A typical example of substitutional solid solution of Zn in Cu is observed in brass, whereas an interstitial solid solution of C in f.c.c. Fe is observed in austenite. Complete solid solubility may be obtained only in alloys when components have the same crystal structure and the size factor is lower than ∼8%. Au–Ni and Ag–Au–Pt are examples of systems showing complete solid solubility

(4)Efflorescence, spontaneous loss of water by a hydrated salt, which occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapour in the air.

Explanation:

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