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प्रश्न
Draw a labelled diagram and explain the laboratory preparation of hydrogen chioride gas.
उत्तर
Hydrogen chloride gas is prepared by the reaction of sodium chloride and sulphuric acid at the temperature below 200°C. Sodium chloride is preferred for laboratory preparation of HCI gas since it is cheapest and most easily available chloride. Lower temperature is preffered because at higher temperature sodium sulphate forms a hard crust and sticks to the bottom of the flask and is difficult to remove.
\[\ce{\underset{\text{Sodium chloride}}{NaCl} + \underset{\text{Sulphuric acid(conc.)}}{H2SO4} ->[<200°C] NaHSO4 + \underset{\text{Hydrogen chloride gas}}{HCl}}\]
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संबंधित प्रश्न
Identify the gas evolved and give the chemical test in the following cases
Dilute hydrochloric acid reacts with iron (II) sulphide.
The following are pertaining to the laboratory preparation of hydrogen chloride gas.
Name the drying agent used and justify your choice.
Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.
Explain why thick white fumes are formed when a glass rod dipped in \[\ce{NH4OH}\] is brought near the mouth of a bottle full of \[\ce{HCl}\] gas.
The given set up in the figure is for the preparation of an acid.
- Name the acid prepared by this method.
- Name the reactants used.
- Why an empty flask is used?
- What is the drying agent used? Why is this drying agent chosen?
- What is the role of the inverted funnel in the arrangement?
The drying agent used to dry \[\ce{HCl}\] gas is ______.
Explain, why (or give reasons for)
In the preparation chloride from sodium chloride, the gas can be obtained below 200°C or above. But the lower temperature is preferred.
Explain, why (or give reasons for)
Hydrogen chloride is not collected over water.
Describe an experiment to prove the following:
HCI gas contains the element chlorine.
Explain, why the following statement is not correct:
Lead chloride can be prepared by adding dilute HCI to lead sulphate solution.
Write the equation for the reaction which takes place in question(a).
Write the equation for :
The preparation of hydrogen chloride from sodium chloride and sulphuric acid. State whether the sulphuric acid should be concentrated or dilute.
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Sodium chloride solution and sodium nitrate solution.
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Sodium sulphate solution and sodium chloride solution.
Give one test to distinguish between the following pair of chemicals.
Iron (III) Chloride solution and copper chloride solution.
State a relevant reason for the following:
Hydrogen chloride gas cannot be dried over quick lime.
Identify the gas evolved in the following reaction:
\[\ce{MnO2}\] reacts with concentrated \[\ce{HCl}\].
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NH4OH + HCl ->}\]
