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प्रश्न
Write the observation for the following:
Decomposition of bicarbonates by dil. H2SO4.
\[\ce{2NaHCO3 + H2SO4 -> Na2SO4 + 2H2O + 2CO2}\]
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उत्तर
Brick effervescence is observed and colourless and odourless CO2 gas is evolved in this case.
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संबंधित प्रश्न
Distinguish between the given pair of compounds using the test given within brackets:
Sodium nitrate and sodium sulphite (using dilute sulphuric acid).
State the inference drawn from the following observations:
Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S.
Give two balanced reactions of each type to show the following properties of sulphuric acid:
Hygroscopic nature
Name the following:
The precipitate obtained by treating aqueous barium chloride with dilute sulphuric acid.
Give reason for the following:
When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
How are the following conversion brought about? Give equation and condition:
Sucrose to sugar charcoal.
Choose the current answer from the options given below :
When conc. H2SO4 comes in contact with sugar, it becomes black due to
Give reason for the following:
Concentrated sulphuric acid is kept in airtight bottles.
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.
Write balanced chemical equation to show :
The oxidizing action of conc.sulphuric acid on carbon
