MEDIUM
JEE Main
IMPORTANT
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In isolation of which one of the following metals from their ores, the use of cyanide salt is commonly not involved?

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Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

EASY
JEE Main
IMPORTANT

Match List I with List II.

List I With Ore List II Composition
A.Siderite I.FeCO3
B.Malachite II.CuCO3·Cu(OH)2
C.Sphalerite III.ZnS
D.Calamine IV.ZnCO3

Choose the correct answer from the options given below:

MEDIUM
JEE Main
IMPORTANT

The compound(s) that is(are) removed as slag during the extraction of copper is :

(1) CaO

(2) FeO

(3) Al2O3

(4) ZnO

(5) NiO

Choose the correct answer from the options given below

MEDIUM
JEE Main
IMPORTANT

Given below are two statements.

Statement I : Pig iron is obtained by heating cast iron with scrap iron.

Statement II : Pig iron has a relatively lower carbon content than that of cast iron.

In the light of the above statements, choose the correct answer from the options given below.

EASY
JEE Main
IMPORTANT

Which of the following methods are not used to refine any metal?

(A) Liquation

(B) Calcination

(C) Electrolysis

(D) Leaching

(E) Distillation

Choose the correct answer from the options given below

HARD
JEE Main
IMPORTANT
Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is