Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Highly reactive metals are extracted by the electrolytic reduction of their molten chlorides or oxides.
Example: Sodium(Na) is extracted by the electrolytic reduction of molten sodium chloride. When electric current is passed through molten sodium chloride, it decomposes to produce sodium metal and chlorine gas.
The equation is given by:
$2NaCl(l) → 2Na(s) + Cl_2(g)$
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- Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
- How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
- Name two metals which are highly resistant to corrosion.
- List the five metals in order of reactivity, starting with the most reactive.
- Carbon cannot reduce the oxides of sodium, magnesium and aluminium to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
- (a) What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:Zinc, Iron, Magnesium, Sodium (b) Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why ? (c) Name one metal more reactive and another less reactive than hydrogen. (d) Name one metal which displaces copper from copper sulphate solution and one which does not. (e) Name one metal which displaces silver from silver nitrate solution and one which does not.
- The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the(a) electrolysis of their molten chloride(b) electrolysis of their molten oxides(c) reduction by aluminium(d) reduction by carbon
- 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.
- (a) What are isotopes? Explain by giving an example.(b) Give one similarity and one difference between a pair of isotopes.
- (a) What is a homologous series? Explain with an example.(b) Define the following terms giving one example of each.(i) Esterification(ii) Addition reaction
- Which of the following statements is correct?All metals are ductile.All non-metals are ductile.Generally, metals are ductile.Some non-metals are ductile.
- (a) How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why cannot the same process be applied for them? Name and explain the process of extraction of sodium.(b) Draw a labelled diagram of electrolytic refining of copper.
- State whether the following statement are True/False.The property of metals by virtue of which they can be drawn into wires is called ductility.Metals are good conductors of electricity but poor conductor of heat.Articles made up of metals produce ringing sound when struck hard.Oxides of non-metals and metals are acidic in nature.A less reactive metal displaces a more reactive metal from its salt solution in water.
- Name the metal which has been placed:(a) At the bottom of the reactivity series (b) At the top of the reactivity series (c) Just below copper in the reactivity ser
- Which of the two metals is more reactive: copper or silver?
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