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प्रश्न
Define the following term : Hygroscopic substance
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उत्तर
Hygroscopic substance : The compound which absorbs water vapour from the atmosphere.
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संबंधित प्रश्न
Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid.
Give reason for the following:
When barium chloride is added to dilute sulphuric acid, a white precipitate is formed.
Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.
Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Sulphur dioxide
What do you observe when barium chloride solution is added to dilute sulphuric acid ?
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Lead sulphate from lead nitrate.
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.
Write balanced chemical equation to show :
The oxidizing action of conc.sulphuric acid on carbon
Write the observation for the following:
Decomposition of bicarbonates by dil. H2SO4.
\[\ce{2NaHCO3 + H2SO4 -> Na2SO4 + 2H2O + 2CO2}\]
Give two balanced reactions of the type to show the following property of sulphuric acid:
Dehydrating nature
