Physical Chemistry
Some Basic Concepts of ChemistryStructure of AtomRedox ReactionsGaseous StateChemical EquilibriumIonic EquilibriumSolutionsThermodynamicsChemical Kinetics and Nuclear ChemistryElectrochemistrySolid StateSurface ChemistryInorganic Chemistry
Periodic Table & PeriodicityChemical Bonding & Molecular StructureIsolation of ElementsHydrogens-Block Elementsp-Block Elementsd and f Block ElementsCoordination CompoundsSalt AnalysisOrganic Chemistry
Basics of Organic ChemistryHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsCompounds Containing NitrogenPolymersBiomoleculesChemistry in Everyday LifePractical Organic ChemistryIsolation of Elements
Practice QuestionsMCQ (More than One Correct Answer)
1
The correct statement(s) related to processes involved in the extraction of metals is(are) :
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2
The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500 \mathrm{~K}$ is(are)
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3
The electrochemical extraction of aluminum from bauxite ore involves
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4
The correct statement(s) related to the metal extraction processes is (are) :
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5
A mixture of two salts is used to prepare a solution S, which gives the following results :
The correct option(s) for the salt mixture is (are)
The correct option(s) for the salt mixture is (are)
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6
Which among the following statement(s) is/are true for the extraction of aluminium from bauxite?
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7
The cyanide process of gold extraction involves leaching out gold from its ore with CN$$-$$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s).
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8
Extraction of copper from copper pyrite (CuFeS2) involves
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9
Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process
is(are)
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10
The carbon–based reduction method is NOT used for the extraction of
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11
Extraction of metal from the ore cassiterite involves
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MCQ (Single Correct Answer)
1
Calamine, malachite, magnetic and cryolite, respectively, are
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2
Match the anionic species given in Column-I that are present in the ore(s) given in Column-II
| Column - I | Column - II |
|---|---|
| (A) Carbonate | (p) Siderite |
| (B) Sulphide | (q) Malachite |
| (C) Hydroxide | (r) Bauxite |
| (D) Oxide | (s) Calamine |
| (t) Argentite |
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3
Sulphide ores are common for the metals
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4
In the cyanide extraction process of silver from argentite ore, the oxidising and reducing agents used are
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5
Oxidation states of the metal in the minerals haematite and magnetite, respectively are
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6
Partial roasting of chalcopyrite produces
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7
Iron is removed from chalcopyrite as
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8
In self-reduction, the reducing species is
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9
Match the conversions in Column I with the type(s) of reaction(s) given in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 $$\times$$ 4 matrix given in the ORS.
| Column I | Column II | ||
|---|---|---|---|
| (A) | PbS $$\to$$ PbO | (P) | roasting |
| (B) | CaCO$$_3$$ $$\to$$ CaO | (Q) | Calcination |
| (C) | ZnS $$\to$$ Zn | (R) | carbon reduction |
| (D) | Cu$$_2$$S $$\to$$ Cu | (S) | self reduction |
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10
Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of:
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