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__

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. How can we convert ore into its oxide form. Explain with proper examples.

Given x^2=cos2theta Write down theta using the inverse of cosine.

Draw maximum number of Galvaniccell using substance given in the table. : Write down the general names used for an electrode which gives electrons.

Draw maximum number of Galvanic cell using substance given in the table. : Write down the balanced equation taking place in both electrodes.

Suggest methods for concentration of the following ores?1. ZnS 2. Fe_2 O_3 3. Cu_2 S

Nature of some ores are given. Pick out the method of concentration from the bracket (Magnetic separation, Froth floatation, Levigation, Leaching). i) Ores are lighter and impurities are heavier. ii) Ore is magnetic. But impurities are non-magnetic iii) Uses a solution which dissolves the ore iv) Ore is heavier and impurities are lighter.

Assertion: If pure haematite is used as an ore for iron extraction, there is no need of roasting Reason: In the extraction of iron, final product in roasting is Fe_2O_3