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प्रश्न
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.
उत्तर
Lower temperature is preferred because at higher temperature sodium sulphate forms a hard crust and sticks to the bottom of the flask and is difficult to remove.
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संबंधित प्रश्न
Certain blank spaces are left in the following table and these are labelled as A, B, C, D
and E. Identify each of them
| Lab preparation of | Reactants used | Products formed | Drying Agent | Method of collection |
|
| 1 | HCl gas | NaCl + H2SO4 |  |
conc. H2SO4 |  |
| 2 | NH3 gas |
|
Mg(OH)2 NH3 |
 |
 |
State your observation in given case When dilute hydrochloric acid is added to sodium carbonate crystals
Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?
For the preparation of hydrochloric acid in the laboratory:
Why is the direct absorption of hydrogen chloride gas in water not feasible?
Draw a labelled diagram for the laboratory preparation of hydrogen chloride gas and answer the following.
- Name the acid used. Why is this particular acid preferred to other acids?
- Give the balanced equation for the reaction.
- Name the drying agent used in drying hydrogen chloride gas.
- Phosphorous pentoxide and calcium oxide are good drying agents, but they cannot be used to dry hydrogen chloride gas. Why?
- Why is the direct absorption of \[\ce{HCl}\] gas in water not feasible?
- What arrangement is done to dissolve \[\ce{HCl}\] gas in the water?
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 drying agent used to dry \[\ce{HCl}\] gas is ______.
Describe an experiment to prove the following:
HCI gas contains the element chlorine.
What is aqua-regia?
Mention the reaction condition and give balanced equation to obtain: Cl2 gas from HCI gas.
Mention the reaction condition and give balanced equation to obtain : HCl gas from common salt
Write balanced equation for the reaction between dilute hydrochloric acid and sodium sulphite.
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.
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (upward displacement) ?
State the observation for action of dilute hydrochloiric acid or iron (II) sulphate.
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 chloride solution and sodium nitrate solution.
Give one test to distinguish between the following pair of chemicals.
Sodium nitrate solution and sodium chloride solution.
Answer the following question related to the laboratory preparation of the hydrogen chloride gas:
Write the chemical equation.
