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प्रश्न
State one appropriate observation of the following:
Action of dilute HCl or sodium sulphite.
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उत्तर
Carbon dioxide gas has no effect on acidified KMnO4 or K2Cr2O7, but sulphur dioxide turns potassium permanganate from pink to colourless.
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संबंधित प्रश्न
Explain, why (or give reasons for)
Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.
Explain, why (or give reasons for)
An aqeous solution of chlorine is acidic is nature.
What would happen if :
Concentrated hydrochloric acid is kept open.
Give two tests for hydrochloric acid.
Name the gas evolved when an oxide and concentrated hydrochloric acid are heated.
Write equation for the reaction between hydrochloric acid of the following: Manganese dioxide
Write equation for the reaction between hydrochloric acid of the following: Oxide of lead
What wilI you observed when concentrated HCI is added to lead (IV) oxide and warmed ?
In the laboratory preparation of hydrochloric acid, HCl gas is dissolved in water.
- Draw a diagram to show the arrangement used for the absorption of HCl gas in water.
- State why such an arrangement is necessary? Give two reasons for the same.
- Write the chemical equation for the laboratory preparation of HCl gas when the reaction is:
- Below 200°C
- Above 200°C
State one appropriate observation of the following:
Copper sulphate is treated with dilute hydrochloric acid.
