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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
पर्याय
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
State one relevant observation for given reactions:
Action of concentrated Sulphuric acid on hydrated copper sulfate
Define the following term : Hygroscopic substance
Give reason for the following:
Ammonia gas cannot be dried by passing through concentrated sulphuric acid.
Name the catalyst used in the process.
Complete the following sentence, choosing the correct word from the given options.
"Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ____________ in comparison to these two acids."
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).
A. Dilute acid (typical acid properties)
B. Non-volatile acid
C. Oxidizing agent
D. Dehydrating agent
(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.
State your observation for the following case :
Dry red rose petals are placed in the jar of sulphur dioxide.
Write the balanced chemical equation for the following conversion:
Ammonium sulphate from ammonia and dilute sulphuric acid.
Name the anion present in the following compound:
Compound D, when warmed with dilute sulphuric acid, gives a gas that turns acidified dichromate solution green.
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
Give a balanced chemical equation for the above reaction.
