General principles & Process Of Isolation of Elements Test

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General principles & Process Of Isolation of Elements Test - 1

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Question 1
1 / -0

Cinnabar is an ore containing

A
CdS

B
Ag₂S

C
Bi₂S₃

D
HgS

Solution

Cinnabar is an ore containing HgS.
Question 2
1 / -0

The metallic luster exhibited by sodium is explained by

A
existence of body centered cubic lattice

B
oscillation of mobile valence electrons

C
diffusion of sodium ions

D
excitation of free electrons

Solution

Metallic lustre is due to oscillation of mobile valance electrons and
these moving electrons radiate electromagnetic energy in the form of light.
Question 3
1 / -0

Cyanide process is used for the extraction of

A
Au

B
Ag

C
Zn

D
Cu

Solution

It involves the formation of water soluble complex of Ag from which Ag is precipitated by adding Zn.
Question 4
1 / -0

Which of the following contains Ca and Mg

A
iceland spar

B
chalk

C
limestone

D
dolomite

Solution

Composition of dolomite is MgCO₃.CaCO₃
Question 5
1 / -0

Fill in the blanks. Horn silver is a _____.

A
Oxidized ore

B
Arsenical ore

C
Haloid ore

D
Sulphurised ore

Solution

Horn silver is AgCl. It is a haloid ore.
Question 6
1 / -0

Cinnabar (HgS) is an ore of mercury. Its colour is

A
red

B
black

C
green

D
yellow

Solution

Cinnabar is red in colour.
Question 7
1 / -0

Which of the following make up the earth's crust ?

A
Iron and nickel

B
Light elements such as oxygen, silicon and aluminium

C
Calcium, Barium

D
None of these

Solution

Earth's crust is made up of light elements such as oxygen, silicon and aluminium
Question 8
1 / -0

Which is the second most abundant element in the light rocks ?

A
None of these

B
Si

C
Al

D
O

Solution

Aluminium (Al) is the second most abundant element in the light rocks.
Question 9
1 / -0

Which part of earth do we find lime stone?

A
crust

B
outer core

C
mantle

D
inner core

Solution

Lime stone is present in crust (i.e., in igneous rocks).

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General principles & Process Of Isolation of Elements Test - 1

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General principles & Process Of Isolation of Elements Test - 1

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Question 1

CdS

Ag2S

Bi2S3

HgS

Solution

Question 2

existence of body centered cubic lattice

oscillation of mobile valence electrons

diffusion of sodium ions

excitation of free electrons

Solution

Question 3

Au

Ag

Zn

Cu

Solution

Question 4

iceland spar

chalk

limestone

dolomite

Solution

Question 5

Oxidized ore

Arsenical ore

Haloid ore

Sulphurised ore

Solution

Question 6

red

black

green

yellow

Solution

Question 7

Iron and nickel

Light elements such as oxygen, silicon and aluminium

Calcium, Barium

None of these

Solution

Question 8

None of these

Si

Al

O

Solution

Question 9

crust

outer core

mantle

inner core

Solution

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Ag₂S

Bi₂S₃