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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
How does sulphuric acid occur in nature?
Name the following:
Products obtained by dissolving sulphur dioxide and chlorine in water.
What would you observe in the following case?
100ml of 98% sulphuric acid is kept open.
Give reason for the following:
In the contact process, sulphur dioxide is dissolved in 98% sulphuric acid and not in water.
Choose the current answer from the options given below :
Which of the following gas dissolves in H2SO4 to give alum?
Fill in the blank with appropriate word/words :
Oil of Vitriol is ___________
Name the following:
A sulphate insoluble in water.
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the NaOH.
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the sugar.
State the observation for the following, when:
Concentrated sulphuric acid is added to carbon.
