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प्रश्न
Give reasons for the following:
A piece of wood becomes black when concentrated sulphuric acid is poured on it.
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उत्तर
A piece of wood becomes black because carbon is set free when cellulose [C6H10O5]n gets charred by conc. H2SO4.
\[\ce{[C6H10O5]_n ->[conc. H2SO4] 6[C]_n + 5[H2O]_n}\]
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संबंधित प्रश्न
What is the name given to the salts of sulphuric acid?
Give reasons for the following:
Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
Distinguish between the following pairs of compounds using the reagent given in the bracket.
Ferrous sulphate solution and ferric sulphate solution. (Using sodium hydroxide solution)
Give reason for the following:
When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
How are the following conversions brought about? Give equation and condition:
Sulphur trioxide to sulphur acid.
Choose the current answer from the options given below :
Which of the following gas dissolves in H2SO4 to give alum?
Sulphuric acid is manufactured by the contact process
Name a gas that can be oxidized to 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:
\[\ce{Active metal + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Carbonate/hydrogen carbonate + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
