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प्रश्न
Give reasons for the following:
Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
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उत्तर
When sulphuric acid is added to sodium carbonate, it liberates carbon dioxide, which produces brisk effervescence.
\[\ce{Na2CO3 + H2SO4 → Na2SO4 + H2O + CO2↑}\]
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संबंधित प्रश्न
Give reason for the following:
When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
Give reason for the following:
Concentrated sulphuric acid must be stored in airtight bottles.
How are the following conversions brought about? Give equation and condition:
Sulphur trioxide to sulphur acid.
How are the following conversion brought about? Give equation and condition:
Aqueous barium chloride to barium sulphate.
Fill in the blank with appropriate word/words :
Oil of Vitriol is ___________
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:
(i) Hydrogen
(ii) Sulphur dioxide
(iii) Carbon dioxide
(iv) Zinc Carbonate (two steps required).
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the sulphur.
What property of conc. H2SO4 is made use of in the following case? Give an equation for the reaction in this case:
It’s reaction with ethanol.
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Carbonate/hydrogen carbonate + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Sulphide + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
