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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
Name the method by which aluminium metal is extracted.
Which metal is extracted from bauxite ore?
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.
(a) Which carbon electrode (cathode or anode) is burnt away?
(b) Why is this carbon electrode burnt away?
Name the following:
Two metals which are found in the free or native state.
What is galvanized iron.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
State three objectives achieved during the roasting of ores.
Define roasting.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
In electrolytic reduction of alumina _______ is used as a cathode.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
In extraction of copper, the flux used is ____________.
Which of the following ore is concentrated by the Froth floatation process?
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
