Isolation of Elements · Chemistry · JEE Advanced
MCQ (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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