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प्रश्न
Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.
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उत्तर
Cotton contains cellulose. When cotton is treated with concentrated sulphuric acid it removes water from cotton and carbon is left behind. This way cotton clothes get burnt.
\[\ce{(C6H10O5)n ->[Conc.H2SO4] 5(C)n + 6(H2O)n}\]
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संबंधित प्रश्न
Write balanced chemical equations for the action of dilute sulphuric acid on sodium sulphite.
Give one equation to show the following properties of sulphuric acid:
Dehydrating property
Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with Ethanol?
Name the products formed when hot and concentrated sulphuric acid reacts with NaOH.
Name the Following:
The property used to prepare HCl and HNO3 from H2SO4.
Give examples of the use of sulphuric acid as
An oxidizing agent
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.
Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?
Identify the salts P and Q from the observation given below:
On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution. Which is soluble in ammonium hydroxide solution.
Complete the table given below:
| Name of the process | Reactants | Acid product formed |
| (a) ______ | Nitrogen dioxide + water + oxygen | (b) ______ |
| (c) ______ | Oleum + water | Sulphuric acid |
