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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.
\[\ce{[C6H10O5]_n ->[conc. H2SO4] 6[C]_n + 5[H2O]_n}\]
संबंधित प्रश्न
Comment, sulphuric acid is referred to as King of chemicals.
Complete the following equations :
S + conc.HNO3 →
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?
Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.
HCl, HNO3 and H2SO4 are formulae of three compounds. Which of these compounds has the highest boiling point and which has the lowest?
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the copper.
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:
\[\ce{Base + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Carbonate/hydrogen carbonate + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
