State One Appropriate Observation of the Following : Which Gas is Evolved When Potassium Sulphite With Dilute Hydrochloric Acid - Chemistry

State one appropriate observation of the following:
Which gas is evolved when potassium sulphite with dilute hydrochloric acid.

One Line Answer

Ethene gas decolourises the purple colour of KMnO₄, whereas ethane does not decolourise KMnO₄ solution.

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Laboratory Method of Preparation of Hydrochloric Acid

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Chapter 8: Study of Compounds-I: Hydrogen Chloride - Exercise 7 [Page 204]

Chapter 8 Study of Compounds-I: Hydrogen Chloride
Exercise 7 | Q 5.3 | Page 204

Explain, why (or give reasons for)
Hydrochloric acid cannot be concentrated above 22.2% by boiling.

What would happen if :
Concentrated hydrochloric acid is kept open.

Describe an experiment to prove the following:
HCI is highly soluble in water.

Give two tests for hydrochloric acid.

Fill in the blank:
Hydrogen and chlorine reacts in presence of ___________ to form hydrogen chloride.

Outline the steps required to convert hydrogen chloride to anhydrous FeCl₃. Write equations for the equations involved.

State one reason why tap water is not used to prepare a solution of silver nitrate in the laboratory.

Write a balanced equation for the reaction of zinc and dilute hydrochloric acid.

State one appropriate observation of the following:

Copper sulphate is treated with dilute hydrochloric acid.

State your observation when :
Dilute hydrochloric acid is added to copper carbonate.