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प्रश्न
What are the important precautions?
उत्तर
Important precautions are -
(i)The lower end of thistle funnel must be dipped below the concentrated H2SO4.
(ii)Temperature should be maintained nearly 200°C because at higher temperature -
(a) The apparatus may break
(b) Fuel is wasted.
(c) Sodium sulphate formed in the reaction forms a crust on the surface which is difficult to remove.
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संबंधित प्रश्न
Write a balanced chemical equation for the action of hydrochloric acid on sodium bicarbonate.
The following are pertaining to the laboratory preparation of hydrogen chloride gas.
State a safety precaution you would take during the preparation of hydrochloric acid.
Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.
Name the drying agents phosphorus pentoxide and calcium oxide are good drying agent but they cannot be used to dry hydrogen chloride gas. Why?
Explain why when the stopper of a bottle full of hydrogen chloride gas is opened, there are fumes in the air.
Explain why a solution of hydrogen chloride in water turns blue litmus red and conducts electricity, while a solution of the same gas in toluene:
- has no effect on litmus, and
- does not conduct electricity.
Explain why dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.
Explain why hydrogen chloride gas is not collected over water.
Draw a labelled diagram and explain the laboratory preparation of hydrogen chioride gas.
Explain, why (or give reasons for)
HCI gas does not conduct electricity, but hydrochloric acid conducts electricity.
Describe an experiment to prove the following:
HCI gas contains the element chlorine.
Choose the correct answer from the options given below:
Dilute hydrochloric acid solution cannot be concentrated by boiling beyond
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (upward displacement) ?
The following question is pertaining to the laboratory pertaining hydrogen chloride gas.
Name the drying agent used and justify your choice.
State the observation for action of dilute hydrochloiric acid or iron (II) sulphate.
Give one test to distinguish between the following pair of chemicals.
Sodium nitrate solution and sodium chloride solution.
In the laboratory preparation, HCl gas is dried by passing through ______.
Complete and balance the following reaction, state whether dilute or conc. acid is used.
\[\ce{NH4OH + HCl ->}\]
