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प्रश्न
Write the molecular formulae of the following compound.
Fluorspar
उत्तर
Fluorspar- CaF2
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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 |
Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
Which metal can be extracted from the following ore?
Haematite
Aluminum is used in thermite welding:
what is thermit?
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
How are metals refined by the electrolytic methods?
Write equations for each of the above metal which reacts with water.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Explain the reactions of nonmetals with water with the help of examples.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Complete flow chart given below.
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
