Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide. (II) It is an exothermic process. (III) It is used for the concentration of sulphide ore. (Iv) It removes easily oxidisable volatile impurities present in the concentrated ore.A. I , II and IIIB. I ,II and IVC. I , III and IVD. I , II , III and IV

Choose the correct option the code regarding roasting process. (I) It

1.	Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain the oxide. (II) It is an exothermic process. (III) It is used for the concentration of sulphide ore. (Iv) It removes easily oxidisable volatile impurities present in the concentrated ore.A. I , II and IIIB. I ,II and IVC. I , III and IVD. I , II , III and IV
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Consider the following statements and arrange in the order of true/false as given in the codes. `S_(1)`:Cuprite, Limonite and Zincite are oxide ares `S_(2)` Magnesite and carnallite are magnesium ores `S_(3)`: Chalcocyte and azurite are ores of copper `S_(4)` Feldspar an mica minerals contain aluminium.A. TTTTB. FTFFC. FFTTD. TTFT
Which of the following statements is correct about the role of substances addedd in the froth floatation process?A. Collectors enhance the non-wettability of the mineral particlesB. Collectors enhance the wettaability of gangue particlesC. By using depressents in the process two sulphides ores can be sepreatedD. Froth stablisers decrease wettability of gangue.
In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________A. using collectorsB. adjusting the proportion of oil to waterC. using depressentD. using froth stablisers
Which of the following ores are concentrated by froth floatation?A. haematiteB. GalenaC. Copper pyritesD. Magnetite
the common impurities present in bauxite areA. CuOB. ZnOC. `Fe_(2)O_(3)`D. `SiO_(2)`
Bauxide ore is made up of `Al_(2)O_(3) + SiO_(2) + TiO_(2) + Fe_(2) O_(3)`. This ore is treated with conc. `NaOH` solution at `500 K` and `35` bar pressure for a few hours and filtered hot. In the filtrate, the species present areA. Na`NaAl(OH)_(4)` onlyB. `Na_(2)Ti(OH)_(6)`C. `NaAl(OH)_(4)` and `Na_(2)SiO_(3)` bothD. `Na_(2)SiO_(3)` Only
During the process of electrolyic refining of copper some metals present as impurity settle as anode mud. These areA. Sn and AgB. Pb and ZnC. Ag and AuD. Fe and Ni
The chemical composition of salg formed during the smelting process in the extraction of copper is :A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`
Which of the following statement is incorrect about the extractive metallurgy of coper?A. Matte chiefly consists of cuprous sulphide and some ferrous sulphide.B. Most of the impurity of iron sulphide is removed as fusible slag during roasting.C. The copper pyrites is concentrated by froth floatiation process.D. The copper obtained from Bessomer converter is called as blister copper.
The chemical composition of slag formed during the smelting process in the extraction of copper is :-A. `Cu_(2)O+FeS`B. `FeSiO_(3)`C. `CuFeS_(2)`D. `Cu_(2)S++FeO`

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