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12 Chemistry
Difference Between Questions
1. What are the difference between Minerals and Ores ? (Sep-20) (May-22)
Minerals Ores
A naturally occurring substance obtained by Ore contains a high percentage of metal
mining which contains the metal in free state or in which can be extracted conveniently and
et
the form of compounds economically
All minerals are not ores All ores are minerals
i.N
It contains a low percentage of metal It contains a high percentage of metals
Ex: Minerals of Al is Bauxite and China Clay Ex: Ore of Al is Bauxite (Al2O3.nH2O)
la
2. Distinguish between Roasting and Calcination.
sa
Roasting Calcination
Roasting is a process in which ore is heated in the Calcination is a process in which ore is
da
presence of excess of air heated in the absence of air
As a result of roasting the sulphide ores are As a result of calcination, the carbonate ore is
converted into their oxides converted into its oxides
Pa
Roasting removes impurities such as arsenic,
During calcination of hydrated ore, the
w.
sulphide, phosphorus by converting them into
water of hydration is expelled as vapour.
their volatile oxide
ww
3. Distinguish Between Diamond and Graphite.
Diamond Graphite
C is sp3 hybridized C is sp2 hybridized
Tetrahedral structure Hexagonal net structure
Crystalline, transparent with extra brilliance Crystalline, opaque and shiny substance
It is soft with low density and high melting
It is hard with high density and high melting point
point
Bad Conductor of heat and electricity Good conductor of heat and electricity
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4. Distinguish between White phosphorus and Red phosphorus.
White Phosphorus Red Phosphorus
It is colourless It is deep red in colour
It is poisonous in nature It is not poisonous
It shows phosphorescence It does not show phosphorescence
Its ignition temperature is very low It does not ignite at low temperature
It has garlic smell It is odourless
et
5. Compare Lanthanides and Actinides.
i.N
Lanthanoids Actinoids
Differentiating electrons enter in 4f orbital Differentiating electron enters in 5f orbital
Binding energy of 4f orbital are higher Binding energy of 5f orbital are lower
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They show greater tendency to form
They show less tendency to form complexes
complexes
sa
Most of the lanthanoids are colourless Most of the actinoids are coloured
They do not form oxocations They do form oxocations
da
Besides +3 oxidation state actinoids show
Besides +3 oxidation state lanthanoids show +2
higher oxidation states such as +4, +5, +6,
and +4 oxidation states in few cases
and +7
Pa
6. Difference between Double salts and Coordination compounds.
w.
Double Salts Coordination Compounds
Double salts contains two simple salt in equimolar The simple salts from which they are formed
ww
proportion may or may not be in equimolar proportion
They exist only in solid state and dissociate into They retain their identity in solid as well as in
consistent species in their solution solution sate
They do not lose their identity in dissolved
They lose their identity in dissolved state
state
Their properties are different form their
Their properties essential the same as these of
constituents for etc… K4 [Fe(CN)6] does not
constituent species
show the test of the Fe2+ and CN- ions
In double salts the metal atom/ion exhibits normal The metal ion exhibits two types of valencies
valency such as primary and secondary valency
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th
12 Chemistry
Difference Between Questions
1. What are the difference between Minerals and Ores ? (Sep-20) (May-22)
Minerals Ores
A naturally occurring substance obtained by Ore contains a high percentage of metal
mining which contains the metal in free state or in which can be extracted conveniently and
et
the form of compounds economically
All minerals are not ores All ores are minerals
i.N
It contains a low percentage of metal It contains a high percentage of metals
Ex: Minerals of Al is Bauxite and China Clay Ex: Ore of Al is Bauxite (Al2O3.nH2O)
la
2. Distinguish between Roasting and Calcination.
sa
Roasting Calcination
Roasting is a process in which ore is heated in the Calcination is a process in which ore is
da
presence of excess of air heated in the absence of air
As a result of roasting the sulphide ores are As a result of calcination, the carbonate ore is
converted into their oxides converted into its oxides
Pa
Roasting removes impurities such as arsenic,
During calcination of hydrated ore, the
w.
sulphide, phosphorus by converting them into
water of hydration is expelled as vapour.
their volatile oxide
ww
3. Distinguish Between Diamond and Graphite.
Diamond Graphite
C is sp3 hybridized C is sp2 hybridized
Tetrahedral structure Hexagonal net structure
Crystalline, transparent with extra brilliance Crystalline, opaque and shiny substance
It is soft with low density and high melting
It is hard with high density and high melting point
point
Bad Conductor of heat and electricity Good conductor of heat and electricity
1 SS PRITHVI PRIT-EDUCATION
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4. Distinguish between White phosphorus and Red phosphorus.
White Phosphorus Red Phosphorus
It is colourless It is deep red in colour
It is poisonous in nature It is not poisonous
It shows phosphorescence It does not show phosphorescence
Its ignition temperature is very low It does not ignite at low temperature
It has garlic smell It is odourless
et
5. Compare Lanthanides and Actinides.
i.N
Lanthanoids Actinoids
Differentiating electrons enter in 4f orbital Differentiating electron enters in 5f orbital
Binding energy of 4f orbital are higher Binding energy of 5f orbital are lower
la
They show greater tendency to form
They show less tendency to form complexes
complexes
sa
Most of the lanthanoids are colourless Most of the actinoids are coloured
They do not form oxocations They do form oxocations
da
Besides +3 oxidation state actinoids show
Besides +3 oxidation state lanthanoids show +2
higher oxidation states such as +4, +5, +6,
and +4 oxidation states in few cases
and +7
Pa
6. Difference between Double salts and Coordination compounds.
w.
Double Salts Coordination Compounds
Double salts contains two simple salt in equimolar The simple salts from which they are formed
ww
proportion may or may not be in equimolar proportion
They exist only in solid state and dissociate into They retain their identity in solid as well as in
consistent species in their solution solution sate
They do not lose their identity in dissolved
They lose their identity in dissolved state
state
Their properties are different form their
Their properties essential the same as these of
constituents for etc… K4 [Fe(CN)6] does not
constituent species
show the test of the Fe2+ and CN- ions
In double salts the metal atom/ion exhibits normal The metal ion exhibits two types of valencies
valency such as primary and secondary valency
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