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प्रश्न
State your observation of the following case:
When dilute hydrochloric acid is added to sodium carbonate crystals.
State one appropriate observation when dilute HCl is added to sodium carbonate crystals.
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उत्तर
Sodium carbonate crystals react with dilute HCl to form sodium chloride, water and carbon dioxide, which evolve with brisk effervescence. The result is a neutralisation reaction, as sodium carbonate is a basic salt, while hydrochloric acid is an acid.
\[\ce{Na2CO3 + 2HCl -> 2NaCl +H2O + CO2 ^}\]
संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of concentrated sulphuric acid on Sulphur.
What would you observe in the following case?
Hot concentrated sulphuric acid is added to sodium chloride crystals.
Give reason for the following:
When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
Describe the reaction that show
Concentrated sulphuric acid is a non-volatile acid.
Describe the reaction that show
Concentrated sulphuric acid behaves as oxidizing agent.
Give reason for the following:
Concentrated sulphuric acid is kept in airtight bottles.
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.
Write the equation of the following reaction:
Sulphur is heated with concentrated sulphuric acid.
State your observation for the following case :
Dry red rose petals are placed in the jar of sulphur dioxide.
