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प्रश्न
Explain the reactions of nonmetals with water with the help of examples.
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
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.
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
Name the gas produced when calamine ore is calcined.
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
Which of the following metals can be obtained from haematite ore?
(a) copper
(b) sodium
(c) zinc
(d) iron
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?
Give reasons, why aluminum is used in:
making alloys
Give the chemical formula of :
Cryolite
Compare the process of calcination and roasting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Answer the following question :
What is the difference between calcination and roasting.
Gold and silver are active metals.
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Explain the following reaction with the balanced equation.
Zinc sulphide is heated strongly in excess of air
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
