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प्रश्न
Explain the reactions of nonmetals with water with the help of examples.
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उत्तर
Generally, nonmetals do not react with water, except halogens.
E.g. Chlorine on dissolving in water gives the following reaction:
\[\ce{\underset{\text{Chlorine}}{Cl_{2(g)}} + \underset{\text{Water}}{H2O_{(l)}} -> \underset{\text{acid}}{\underset{\text{Hypochlorous}}{HOCl_{(aq)}}} + \underset{\text{acid}}{\underset{\text{Hydrochloric}}{HCl_{(aq)}}}}\]
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संबंधित प्रश्न
Why does a new aluminium vessel lose shine so soon after use?
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Give the name and chemical formula of one ore of copper.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name the metal which is extracted from haematite ore.
Give the principles of the froth floatation process.
What is passive iron?
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Define calcination.
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
Find the odd one out and give its explanation.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Write the molecular formulae of the following compound.
Cryolite
Explain Bayer’s process.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
Which of the following ore is concentrated by the Froth floatation process?
