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प्रश्न
Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain, how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced.
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उत्तर
An inverted funnel connected to the HCl gas supply is placed in a beaker so that the rim of the funnel just touches the surface of the water. HCl gas enters through the delivery tube, fills the mouth of the funnel, and then dissolves in water. Hence, a low pressure is created, and back suction occurs. As a result, the water level rises in the funnel, and the water level in the beaker drops. Thus, the rim of the funnel loses contact with water and the outside air rushes in through the gap to equalise the pressure on either side of the funnel. The solution falls back into the beaker due to gravity. The water level then falls, and the funnel drops back to its original position.
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संबंधित प्रश्न
When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.
When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.
Name the following:
Gas obtained by treating metals with hydrochloric acid.
Name :
Two colourless gases which when mixed produce a white solid.
Name the drying agent used to dry HCl gas.
How can you prove that hydrochloric acid contain :
Chlorine?
Name two gases which combine chemically to form a solid.
Hydrogen chloride dissolves in water to form an acidic solution.
- Name the experiment which demonstrates that hydrogen chloride is very soluble in water.
- Give three distinct tests (apart from using an indicator) you would carry out with this solution to illustrate the typical properties of an acid.
(a) Name the experiment illustrate above.
(b) Which property of hydrogen chloride is demonstrated by this experiment?
(c) State the colour of the water that has entered the round-bottomed flask.
The diagram shows an apparatus for the laboratory preparation of hydrogen chloride.
(i) Identify A and B
(ii) Write the equation for the reaction
(iii) How would you check whether or not the gas jar is filled with hydrogen chloride?
(iv) What does the method of collection tell you about the density of hydrogen chloride.
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?
