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प्रश्न
Give reason for the following:
When diluting concentrated sulphuric acid, the acid should be added to water and not water to the acid.
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उत्तर
When water is added to concentrated sulphuric acid the heat evolved may be sufficient to raise the temperature of water to its boiling point. This may throw acid violently out of the container. Thus concentrated sulphuric acid is diluted by adding a small amount of sulphuric acid to large amount of water.
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संबंधित प्रश्न
Complete the following equations :
C + cons. H2SO4
Give reason for the following:
In the contact process, sulphur dioxide is dissolved in 98% sulphuric acid and not in water.
Fill in the blank with appropriate word/words :
For the reaction SO2 + O2⇌ SO3 + Heat, the favourable conditions are _________ and __________.
HCl, HNO3 and H2SO4 are formulae of three compounds. Which of these compounds has the highest boiling point and which has the lowest?
Sulphuric acid is manufactured by the contact process.
Why H2SO4 is not obtained by directly reacting SO3 with water?
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the NaOH.
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the sugar.
Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reactions (i) to (v). Some properties may be repeated:
- Typical acid
- Dehydrating agent
- Non-volatile acid
- Oxidizing agent
- \[\ce{C12H22O11 + nH2SO4 -> 12C + 11H2O + nH2SO4}\]
- \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\]
- \[\ce{NaCl + H2SO4 -> NaHSO4 + HCl}\]
- \[\ce{CuO + H2SO4 -> CuSO4 + H2O}\]
- \[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Sulphide + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
State the observation for the following, when:
Concentrated sulphuric acid is added to carbon.
