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प्रश्न
How will you distinguish between conc. HCl and conc. H2SO4?
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उत्तर
Conc. HCl and Conc. H2SO4:
| S.No. | Conc. HCl | Conc. H2SO4 |
| 1. | Addition to silver nitrate : When conc. HCI is added to silver nitrate white ppt. of silver chloride are formed. \[\ce{AgNO3 + HCl -> AgCl + HNO3}\] White ppt. of silver chloride dissolve in excess of ammonium hydroxide. |
Addition to copper : Conc. Sulphuric acid is added to copper and heated. Sulphur dioxide, which is colourless gas with the smell of burnt sulphur is evolved. \[\ce{Cu + 2H2SO4 -> CuSO4 + 2H2O + SO2}\] SO2 gas turns K2Cr2O7 paper green. |
| 2. | A glass rod dipped in conc. HCl is brought in contact with ammonia gas, curdy white fumes of ammonium chloride is seen around the glass rod. | Glucose when conc. Sulphuric acid \[\ce{\underset{\text{blue}}{CuSO4.5H2O} ->[conc.H2SO4] CuSO4 + \underset{\text{white}}{5H2O}}\] |
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संबंधित प्रश्न
Comment, sulphuric acid is referred to as oil of vitriol.
Give reasons for the following:
Sulphuric acid forms two types of salts with NaOH.
Complete the following equations :
S + conc.HNO3 →
What would you observe in the following case?
Sulphur trioxide is dissolved in water on a large scale.
Fill in the blank with appropriate word/words :
For the reaction SO2 + O2⇌ SO3 + Heat, the favourable conditions are _________ and __________.
A, B, C and D summarise the properties of sulphuric acid depending on whether it is dilute or concentrated.
A = Typical acid property
B = Non-Volatile acid
C = Oxidising agent
D = Dehydrating agent
Choose the property (A, B, C or D) depending on which is relevant to each of the following :
(i) Preparation of hydrogen chloride gas
(ii) Preparation of copper sulphate from copper oxide
(iii) Action of cone, sulphuric acid on sulphur
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 copper.
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:
\[\ce{Sulphide + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
