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प्रश्न
Give reason for the following:
When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.
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उत्तर
Hot concentrated sulphuric acid act as a powerful oxidizing agent. Due to heat it decomposes to form nascent oxygen which helps in oxidation of carbon to carbon dioxide.
\[\ce{H2SO4 -> H2O + SO2 + [O]}\]
\[\ce{C + 2[O] -> CO2}\]
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संबंधित प्रश्न
Distinguish between the given pairs of compounds using the test given within brackets:
Dilute sulphuric acid and dilute hydrochloric acid (using barium chloride solution)
Why is water not added to concentrated H2SO4 in order to dilute it?
Name the products formed when hot and concentrated sulphuric acid reacts with Carbon.
Give reason for the following:
When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
Give reason for the following:
H2SO4 cannot be prepared by heating sodium sulphate with conc. HCl or HNO3
The following statement is correct only under certain conditions. Rewrite the statement including the appropriate conditions.
Oxalic acid reacts with sulphuric acid to produce carbon monoxide and carbon dioxide.
What would you see, when a crystal of CuSO4.5H2O is placed in concentrated sulphuric acid? Give reason to explain your observation.
Copy and complete the following table.
Column 3 has the names of gases to be prepared using the substance you enter in column 1, along with dilute or concentrated sulphuric acid, as indicated in column 2.
| Column 1 | Column 2 | Column 3 |
| Substance reacted with acid | Dilute or concentrated sulphuric acid | Gas |
| Hydrogen | ||
| Carbon dioxide | ||
| Only chlorine |
Write the equation for the laboratory preparation of :
(i) Sodium sulphate using dilute sulphuric acid.
(ii) Lead sulphate using dilute sulphuric acid.
State two observations when
A few crystals of KNO3 are heated in a hard glass tube
Differentiate between the following pair based on the criteria given in the bracket:
Cane sugar and hydrated copper sulphate [using concentrated H2SO4]
