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प्रश्न
Complete flow chart given below.
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उत्तर
संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
What chemical process is used for obtaining a metal from its oxide?
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
Which metal is extracted from cinnabar ore?
Which of the following metals can be obtained from haematite ore?
(a) copper
(b) sodium
(c) zinc
(d) iron
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its:
(a) oxide
(b) hydride
(c) sulphide
(d) carbonate
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
In making ships
Aluminum is used in thermite welding:
what is ignition mixture?
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
How many valence electrons are present in metals ?
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
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.
The electrolysis of alumina involves the use of fluorspar and cryolite to increase the melting point.
Explain the characteristics of ionic compounds.
Care must be taken while diluting concentrated nitric acid with water. Why?
