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प्रश्न
Choose the current answer from the options given below :
When conc. H2SO4 comes in contact with sugar, it becomes black due to
विकल्प
Hydrolysis
Decolourisation
Dehydration
Hydration
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उत्तर
When conc. H2SO4 comes in contact with sugar, it becomes black due to Dehydration.
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संबंधित प्रश्न
Write balanced chemical equations to show how SO3 is converted to Sulphuric acid in the contact process.
The acid which is used in the preparation of a volatile acid
State the inference drawn from the following observations:
Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S.
Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid.
Give examples of the use of sulphuric acid as
Non-volatile acid
Give main difference between drying agent and dehydrating agent.
Give reason for the following:
Concentrated sulphuric acid is kept in airtight bottles.
What do you observe when barium chloride solution is added to dilute sulphuric acid?
Copy and complete the following table.
Column 3 has the names of gases to be prepared using the substance you enter in column 1, along with dilute or concentrated sulphuric acid, as indicated in column 2.
| Column 1 | Column 2 | Column 3 |
| Substance reacted with acid | Dilute or concentrated sulphuric acid | Gas |
| Hydrogen | ||
| Carbon dioxide | ||
| Only chlorine |
Write the equation for the laboratory preparation of :
(i) Sodium sulphate using dilute sulphuric acid.
(ii) Lead sulphate using dilute sulphuric acid.
Give balanced chemical equation to prepare the following salt:
Lead sulphate from lead carbonate
