Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore.
How can we convert ore into its oxide form. Explain with proper examples.

Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore. Strongest reducing agent………….

Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore. Give Example for reducing agents for reducing oxide ores.

Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore. Which reducing agent used for reducing ZnO,Fe_2O_3,AI_2O_3 ?

Features of ore and impurity are given in the table. Write down the method usedfor theseparation of theore. ZnCO_3 / Cu_2S in this two calcination is used for____________and Roasting is used for__

You know that electrical energy can be converted into many other forms. Write down some examples.

Analyses the table given below: Which of the ores mentioned in the above table can be concentrated by magnetic separation method? Justify your answer.

Aluminium is prepared industrially by Hall- Heroult process. Various steps in the concentration of ore are given below. Write them in the correct order. i)The precipitate formed is separated, washed and strongly heated to get alumina. ii) Crushed bauxite is leached with hot sodium hydroxide solution. iii) Impurities are removed from the sodium aluminate solution by filtration. iv) Solution is diluted after adding a little aluminium hydroxide, to precipitate aluminium hydroxide .

Which of the following statements are wrong? i) Calcination is mainly used for carbonate ore to get its oxide ii) Hydrated ore and hydroxides become anhydrous by calcination iii) Impurities like S, As and Sb are removed in the form of elemental vapours by calcination iv) Roasting is an endothermic process v) Roasting is mainly applicable for sulphide ore to get its oxide vi) Some times as a result of roasting, higher oxidation state oxide gets converted into lower oxidation state oxide.