(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
Answers
Answer:
Ans1:-Calcination is the process in which the oreis heated below its melting point inabsence of air.
Ans2:- Ionic compounds conduct electricity when molten(liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity whensolid, as their ions are held in fixed positions and cannot move
Ans3:-Precipitation is the process of conversion of a chemical substance into a solid from asolution by converting the substance into an insoluble form or a super-saturated solution. When the reaction occurs in a liquid solution, thesolid formed is called the precipitate.
Ans4:-Efflorescence is the property by which certain hydrated salts, when left exposedto the atmosphere, lose their water of crystallisation and crumble into powder.