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Question
Which of the following reactions gives CO as their major product?
Which of the following reactions gives CO as their major product?
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Solution
The correct options are
A 2C(s)+limited supply of O2(g)Δ⟶
B HCOOH(l)con.H2SO4, Δ⟶
1. Oxidation of carbon in limited supply of oxygen or air yield carbon monoxide. This is called incomplete combustion.
2C(s)+limited supply of O2(g)Δ⟶2CO(g)
2. Dehydration of formic acid with concentrated H2SO4 at 373 K yield CO and water.
HCOOH(l)con.H2SO4, Δ⟶CO(g)+H2O(l)
3. This reaction is an industrial preparation method of CaO. CO2 is released during the reaction.
CaCO3(s)→CaO(s)+CO2(g)
4. This reaction is the complete combustion of carbon in presence of excess oxygen. This gives CO2 as the major product.
C(s)+O2(g)Δ⟶CO2(g)
THEORY
Preparation:
1. Direct oxidation of C in a limited supply of oxygen or air
2C(s)+O2(g)△→2CO(g)
2. By dehydrating formic acid with concentrated H2SO4 at 373K
HCOOH(l)373K−−−−−−−→conc.H2SO4CO(g)+H2O(I)
3. By the passage of steam over hot coke.
C(s)+H2O(g)473−1273K→CWaterorsynthesisgasO(g)+H2(g)
4. If air is used instead of steam, a mixture of CO and N2 is produced.
2C(s)+O2(g)+4N2(g)1273K→2CO(g)+4N2Producergas(g) - Water gas and producer gas are very important industrial fuels.
- CO in water gas or producer gas can undergo further combustion forming CO2 with the liberation of heat.
A 2C(s)+limited supply of O2(g)Δ⟶
B HCOOH(l)con.H2SO4, Δ⟶
1. Oxidation of carbon in limited supply of oxygen or air yield carbon monoxide. This is called incomplete combustion.
2C(s)+limited supply of O2(g)Δ⟶2CO(g)
2. Dehydration of formic acid with concentrated H2SO4 at 373 K yield CO and water.
HCOOH(l)con.H2SO4, Δ⟶CO(g)+H2O(l)
3. This reaction is an industrial preparation method of CaO. CO2 is released during the reaction.
CaCO3(s)→CaO(s)+CO2(g)
4. This reaction is the complete combustion of carbon in presence of excess oxygen. This gives CO2 as the major product.
C(s)+O2(g)Δ⟶CO2(g)
THEORY
Preparation:
1. Direct oxidation of C in a limited supply of oxygen or air
2C(s)+O2(g)△→2CO(g)
2. By dehydrating formic acid with concentrated H2SO4 at 373K
HCOOH(l)373K−−−−−−−→conc.H2SO4CO(g)+H2O(I)
3. By the passage of steam over hot coke.
C(s)+H2O(g)473−1273K→CWaterorsynthesisgasO(g)+H2(g)
4. If air is used instead of steam, a mixture of CO and N2 is produced.
2C(s)+O2(g)+4N2(g)1273K→2CO(g)+4N2Producergas(g)
- Water gas and producer gas are very important industrial fuels.
- CO in water gas or producer gas can undergo further combustion forming CO2 with the liberation of heat.
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