a carbon compound p on heating with conc. h2so4 forms another carbon compound q which on addition of hydrogen in presence of Ni catalyst form a saturated compound R . one molecule of R on combustion form two molecules of co2 and three molecules of water. Identify P Q R
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Compound P:
The compound P is ethanol. The process of heating ethanol with concentrated sulfuric acid is known as dehydration.
This process of dehydration of alcohol is done using a strong acid such as sulfuric acid or phosphoric acid in the presence of a lot of heat.
The summary of the process is that water molecule is removed from the ethanol to give ethene. The reaction is as follows;
C₂H₅OH = C₂H₄+ H₂O
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Compound Q:
The carbon compound formed q is the ethene that is formed from the reaction of hot conc. sulfuric acid and ethanol. The reaction is as follows;
C₂H₅OH = C₂H₄+ H₂O
Ethene = CH₂ -CH₂ (C₂H₄)
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Saturated Compound R is:
When you react ethene with hydrogen, the compound formed is ethane. This process is known as hydrogenation of alkenes to form alkanes. It takes place at a temperature of about 150°C and in the presence of finely divided nickel(Ni) that acts as a catalyst.
The equation for the reaction is as follows:
Ni
CH₂ -CH₂ + H₂ ------------------> CH₃ - CH₃
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Combustion of Ethane (CH₃ - CH₃):
The reaction for the combustion of ethane is as follows:
2C₂H₆(g) + 7O₂(g) ---------> 4CO₂(g) + 6H₂O(l)
As you can see 4 molecules of CO₂ are formed for every 6 molecules of H₂O, which is in the ratio 2:3. Meaning for every 2 molecules of CO₂ we get 3 molecules of H₂O
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The compound P is ethanol. The process of heating ethanol with concentrated sulfuric acid is known as dehydration.
This process of dehydration of alcohol is done using a strong acid such as sulfuric acid or phosphoric acid in the presence of a lot of heat.
The summary of the process is that water molecule is removed from the ethanol to give ethene. The reaction is as follows;
C₂H₅OH = C₂H₄+ H₂O
------------------------------------------------------------------------------------------------------
Compound Q:
The carbon compound formed q is the ethene that is formed from the reaction of hot conc. sulfuric acid and ethanol. The reaction is as follows;
C₂H₅OH = C₂H₄+ H₂O
Ethene = CH₂ -CH₂ (C₂H₄)
------------------------------------------------------------------------------------------------------
Saturated Compound R is:
When you react ethene with hydrogen, the compound formed is ethane. This process is known as hydrogenation of alkenes to form alkanes. It takes place at a temperature of about 150°C and in the presence of finely divided nickel(Ni) that acts as a catalyst.
The equation for the reaction is as follows:
Ni
CH₂ -CH₂ + H₂ ------------------> CH₃ - CH₃
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Combustion of Ethane (CH₃ - CH₃):
The reaction for the combustion of ethane is as follows:
2C₂H₆(g) + 7O₂(g) ---------> 4CO₂(g) + 6H₂O(l)
As you can see 4 molecules of CO₂ are formed for every 6 molecules of H₂O, which is in the ratio 2:3. Meaning for every 2 molecules of CO₂ we get 3 molecules of H₂O
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