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Question
State your observation for the following case :
Dry red rose petals are placed in the jar of sulphur dioxide.
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Solution
Dry SO2 has no effect on dry red rose petals.
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RELATED QUESTIONS
The acid which is used in the preparation of a volatile acid
Name the products formed when hot and concentrated sulphuric acid reacts with Sugar.
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When concentrated sulphuric acid is exposed to air, its volume increases and it becomes slightly dilute.
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A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (ii).
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B. Non-volatile acid
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D. Dehydrating agent
(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.
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Sulphur
Write a balanced equation for the following conversion:
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B. Dehydrating agent
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Match the following equations 1 to 3 to the above chemical properties of sulphuric acid.
1. \[\ce{KNO3 + H2SO4 -> KHSO4 + HNO3}\]
2. \[\ce{C12H22O11 -> 12C + 11H2O}\]
3. \[\ce{S + 2H2SO4 -> 2H2O + 3SO2}\]
