1
JEE Advanced 2015 Paper 1 Offline
MCQ (Single Correct Answer)
+8
-4
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
A
(A) $$\to$$ p,q,s; (B) $$\to$$ t; (C) $$\to$$ q,r; (D) $$\to$$ r
B
(A) $$\to$$ s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ r,s
C
(A) $$\to$$ p,s; (B) $$\to$$ s,t; (C) $$\to$$ r; (D) $$\to$$ s
D
(A) $$\to$$ p,q,s; (B) $$\to$$ s,t; (C) $$\to$$ p,r; (D) $$\to$$ t
2
JEE Advanced 2013 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
Sulphide ores are common for the metals
A
Ag, Cu and Pb
B
Ag, Mg and Pb
C
Ag, Cu and Sn
D
Al, Cu and Pb
3
IIT-JEE 2012 Paper 2 Offline
MCQ (Single Correct Answer)
+2
-0.5
In the cyanide extraction process of silver from argentite ore, the oxidising and reducing agents used are
A
O2 and CO respectively
B
O2 and Zn dust respectively
C
HNO3 and Zn dust respectively
D
HNO3 and CO respectively
4
IIT-JEE 2011 Paper 2 Offline
MCQ (Single Correct Answer)
+1
-0.25
Oxidation states of the metal in the minerals haematite and magnetite, respectively are
A
II, III in haematite and III in magnetite
B
II, III in haematite and II in magnetite
C
II in haematite and II, III in magnetite
D
III in haematite and II, III in magnetite
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