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Question
Give reasons for the following:
A piece of wood becomes black when concentrated sulphuric acid is poured on it.
Solution
A piece of wood becomes black because carbon is set free when cellulose \[\ce{[C6H10O5]n}\] gets charred by conc. \[\ce{H2SO4}\].
\[\ce{[C6H10O5]n ->[conc. H2SO4] 6[C]n + 5[H2O]n}\]
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RELATED QUESTIONS
Give reasons for the following:
Sulphuric acid forms two types of salts with \[\ce{NaOH}\].
What would you observe in the following case?
Sulphur trioxide is dissolved in water on a large scale.
What would you observe in the following case?
100ml of 98% sulphuric acid is kept open.
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When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
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Write a balanced chemical equation when hot and concentrated sulphuric acid reacts with the following:
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The following are the typical properties of dilute acid. Complete them by inserting suitable words:
Active metal + acid → ______ + ______
The following are the typical properties of dilute acid. Complete them by inserting suitable words:
Base + Acid → ______ + ______
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Sulphide + Acid → ______ + ______
