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प्रश्न
Define the following term : Hygroscopic substance
उत्तर
Hygroscopic substance : The compound which absorbs water vapour from the atmosphere.
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संबंधित प्रश्न
Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid.
Give reason for the following:
When carbon is heated with concentrated sulphuric acid, carbon dioxide is formed.
Give reason for the following:
Concentrated sulphuric acid should not be added to oxalic acid or formic acid in the open laboratory.
How are the following conversion brought about? Give equation and condition:
Oxalic acid to carbon monoxide.
Which concentrated acid oxidizes sulphur directly to sulphuric acid ? Write the equation for the same. What is the name of the process by which sulphuric acid is manufactured ? Name the catalyst used in the process.
- Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C.
- In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two steps involved in D.
- What type of substance will liberate sulphur dioxide from sodium sulphite in step E?
- Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F.
Give one equation to show the following property of sulphuric acid:
Acidic nature
Write the balanced chemical equation for the following conversion:
Lead sulphate from lead nitrate solution and dilute sulphuric acid.
State your observation of the following case:
When dilute hydrochloric acid is added to sodium carbonate crystals.
The property exhibited by concentrated sulphuric acid when it is used to prepare hydrogen chloride gas from potassium chloride is ______.
