Account for the following facts:
(a) The reduction of a metal oxide is easier if the metal formed is in the liquid state at the temperature of reduction.
(b) Limestone is used in the manufacture of pig iron from haematite.
(c) Pine oil is used in the froth flotation process used to concentrate sulphide ores.

Why is the reduction of a metal oxide easier if the metal formed is in liquid state at the temperature of reduction?

Froth flotation process used for the concentration of sulphide ore.

Assertion : Reduction of a metal oxide is easier if the metal formed is in liquid state at the temperature of reduction. Reason : Ihe entropy is higher if the metal is in liquid state.

Account for the following facts : pine oil is used in froth floatation method.

Fill in the blanks by selecting correct word/term given in the brackets. Froth floatation process is used to concentrate __________ ores. (oxide/sulphide)

From the following flowsheet for the extraction of pure metal, answer the given questions. (ii) Step B (reduction) can be carried out ny using :

From the following flowsheet for the extraction of pure metal, answer the given questions. (v) Reduction of oxides to elements with carbon generally takes place at high temperature, hence Al is used in aluminothermite process. It is because :

Consider the following metallurgical processes : (I) Electrolysis of molten mixiure of about 40% metal chloride and 60% calcium chloride (II) Heating the impure metal with l_2 at around 523 K to from metal iodide and their subsequent decomposition at higher temperature to yield pure metal (III) Heating the sulphide ore in the presence of air untill a part of it is converted to its oxide and the further heating the oxide in the absence of air with metal sulphide to produce metal The process used for obtaining titanium sodium and copper repsectively are

In the stages involved in the extraction of metals in general - give reasons for following An electromagnetic wheen is used in the magnetic separation process of ore from gangue.

Metal sulphides occur mainly in rocks and metal halides occur in lakes and seas. Give reason. (b) Pine oil is used in froth flatation process. Why ? ( c) What is a depresent ? Give an example. (d) What is the role of stabiliser in froth flotation process ? ( e) What is gangue ?