1
JEE Main 2022 (Online) 24th June Morning Shift
+4
-1

Match List - I with List - II :

List - I List -II
(A) Sphalerite (I) FeCO$$_3$$
(B) Calamine (II) PbS
(C) Galena (III) ZnCO$$_3$$
(D) Siderite (IV) ZnS

Choose the most appropriate answer from the options given below :

A
(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
B
(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
C
(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
D
(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
2
JEE Main 2021 (Online) 1st September Evening Shift
+4
-1
Calamine and Malachite, respectively, are the ores of :
A
Nickel and Aluminium
B
Zinc and Copper
C
Copper and Iron
D
Aluminium and Zinc
3
JEE Main 2021 (Online) 31st August Morning Shift
+4
-1
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2O3 with cryolite.

Reason (R) : The oxidation state of Al in cryolite is +3.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
(A) is true but (R) is false.
B
(A) is false but (R) is true.
C
Both (A) and (R) are correct and (R) is the correct explanation of (A)
D
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
4
JEE Main 2021 (Online) 31st August Morning Shift
+4
-1
Given below are two statements :

Statement I : The process of producing syn-gas is called gasification of coal.

Statement II : The composition of syn-gas is CO + CO2 + H2 (1 : 1 : 1)

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Statement I is false but Statement II is true
B
Statement I is true but Statement II is false
C
Both Statement I and Statement II are false
D
Both Statement I and Statement II are true
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