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Byju's Answer
Standard VIII
Geography
Minerals in Different Continents
Which of the ...
Question
Which of the following occur as a sulphide ore?
Ca,Zn,Ag,Cr,Fe,Hg,Pb,Cu
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Solution
All of the above mentioned elements can occur as sulphide ores except Hg (liquid in nature) can occur as sulphide ore.
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Similar questions
Q.
L
i
,
K
,
C
a
,
N
a
,
M
g
,
A
l
,
Z
n
,
F
e
,
P
b
,
C
u
,
H
g
,
A
g
I
. The reaction
Z
n
(
s
)
+
C
u
(
N
O
3
)
2
(
a
q
)
→
C
u
(
s
)
+
Z
n
(
N
O
3
)
2
(
a
q
)
will occur.
I
I
. Zinc and copper are both transition metals.
Q.
How many of the following metals is extracted by self reduction process?
P
b
,
A
u
,
M
g
,
S
n
,
F
e
,
A
l
,
A
g
,
H
g
,
N
a
,
Z
n
,
C
u
,
C
a
Q.
L
i
,
K
,
C
a
,
N
a
,
M
g
,
A
l
,
Z
n
,
F
e
,
P
b
,
C
u
,
H
g
,
A
g
Which metal will displace hydrogen from acids but not water?
Q.
L
i
,
K
,
C
a
,
N
a
,
M
g
,
A
l
,
Z
n
,
F
e
,
P
b
,
C
u
,
H
g
,
A
g
I
. The reaction
3
F
e
(
s
)
+
2
A
l
(
N
O
3
)
3
(
a
q
)
→
2
A
l
(
s
)
+
3
F
e
(
N
O
3
)
2
(
a
q
)
will occur.
I
I
. Iron is higher on the activity series than aluminum.
Q.
The arrangement of some of the metals forming thermoelectric series is Sb, Fe, Zn, Ag, Mo, Cr,Sn, Pb, Hg, Mn, Cu, Co, Ni, Bi.
Arrange the following thermo-couples in the ascending order of producing thermo emf at a particular constant temperature
a) Fe - CO b) Sb - Bi
c) Ag - Mn d) Zn - Cu
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