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प्रश्न
Give reason for the following:
Concentrated sulphuric acid must be stored in airtight bottles.
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उत्तर
Concentrated sulphuric acid must be stored in air tight bottles as it gains water from air and gets slightly diluted thus resulting in increase in volume.
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संबंधित प्रश्न
Give reasons for the following:
Sulphuric acid forms two types of salts with NaOH.
Give reason for the following:
Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.
Write a balanced chemical equation for each of the following reactions :
Action of dilute sulphuric acid on sodium hydroxide.
What would you observe in the following case?
Sulphur trioxide is dissolved in water on a large scale.
Give reason for the following:
In the contact process, sulphur dioxide is dissolved in 98% sulphuric acid and not in water.
How are the following conversions brought about? Give equation and condition:
Sulphur trioxide to sulphur acid.
How will you distinguish between conc. HCl and conc. H2SO4?
Making use only of substances chosen from those given below:
Dilute sulphuric acid
Sodium carbonate
Zinc
Sodium sulphite
Lead
Salcium carbonate
Give the equation for the reaction by which you could obtain:
- Hydrogen
- Sulphur dioxide
- Carbon dioxide
- Zinc Carbonate (two steps required).
Sulphuric acid is manufactured by the contact process
Name a gas that can be oxidized to sulphur.
State the observation for the following, when:
Concentrated sulphuric acid is added to carbon.
