Table of Contents
- 1 Is Na extracted by carbon reduction method?
- 2 Why metals like potassium and sodium Cannot be extracted by reduction of their oxides by carbon?
- 3 Can potassium be extracted through reduction by carbon?
- 4 Which metal oxide is reduced by carbon reduction method?
- 5 What are the difficulties for extraction of sodium by electrolysis of fused nacl?
- 6 Can aqueous sodium chloride be used for electrolytic extraction of sodium?
- 7 What metal would reduce Aluminium ore?
- 8 Which metals can be extracted through reduction with carbon and why?
- 9 Why are metals like Na K Ca and MG found in impure form?
- 10 Why can’t carbon reduce the oxides of Na and MG?
- 11 What happens when aluminium is dipped in nitric acid?
Is Na extracted by carbon reduction method?
But this approach works exceptionally i.e. only for less reactive metals i.e. elements in the reactivity sequence put below Aluminium e.g. iron, zinc, lead, copper etc. Since carbon cannot reduce more active metals such as sodium, it is used for such processes of extraction as electrolysis.
Why metals like potassium and sodium Cannot be extracted by reduction of their oxides by carbon?
Note: The highly reactive metals like potassium, sodium, calcium and aluminium are more reactive than carbon. Thus, they cannot be extracted from their oxides by carbon.
Why is sodium not extracted by reduction?
metals like potassium and sodium can’t be extracted from their ores by carbon reduction method. This is because these metals have more affinity (more attraction) for oxygen than carbon. so carbon is unable to remove oxygen from these metal oxides and hence cannot convert them into free metals.
Can potassium be extracted through reduction by carbon?
Potassium and sodium are strong electropositive metals and have great affinity for oxygen than that of carbon. Hence they Cannot be extracted from their oxides by reduction with carbon.
Which metal oxide is reduced by carbon reduction method?
Carbon reduction reaction of lead oxide – Lead oxide can be reduced to lead metal. This reaction is used in the metallurgy of lead metal. Hence only lead metal can be reduced by carbon reduction as well as self-reduction.
Which metals are extracted by carbon reduction method?
Reactivity and extraction method
| Metal | Method |
|---|---|
| Zinc | Reduction by carbon or carbon monoxide |
| Iron | Reduction by carbon or carbon monoxide |
| Tin | Reduction by carbon or carbon monoxide |
| Lead | Reduction by carbon or carbon monoxide |
What are the difficulties for extraction of sodium by electrolysis of fused nacl?
(i) The melting point of sodium chloride (1085K) is very high and it is quite difficult to keep the sodium chloride in the molten state at such a high temperature during its electrolysis. (ii) Since the boiling point of sodium is 1160K, the metal tends to change into vapours at a high temperature of electrolysis.
Can aqueous sodium chloride be used for electrolytic extraction of sodium?
An aqueous solution of sodium chloride is not used for electrolytic reduction of sodium metal because if we electrolyse an aqueous solution of sodium chloride, then as soon as sodium metal is produced at the cathode, it will react with water to form sodium hydroxide.
Why is extraction of metals always a reduction process?
The extraction of metal always a reduction process. Because a metal in the combined state has positive valency and a positive ion gets converted into atom or metal on addition of electron(s). Thus, by definition it is a reduction process.
What metal would reduce Aluminium ore?
A lot of energy is needed to reduce them to extract the metal….Reactivity and extraction method.
| Metal | Method |
|---|---|
| Aluminium | Electrolysis |
| (Carbon) | (Non-metal) |
| Zinc | Reduction by carbon or carbon monoxide |
| Iron | Reduction by carbon or carbon monoxide |
Which metals can be extracted through reduction with carbon and why?
Reactivity and extraction method
| Metal | Method |
|---|---|
| Iron | Reduction by carbon or carbon monoxide |
| Tin | Reduction by carbon or carbon monoxide |
| Lead | Reduction by carbon or carbon monoxide |
| (Hydrogen) | (Non-metal) |
Which elements can be reduced by carbon?
All of the metal oxides are reduced by carbon because carbon is higher up in the reactivity series than the metals we are looking at. Which two of the metal oxides could be reduced by hydrogen? Silver and copper, because they are below hydrogen in the reactivity series.
Why are metals like Na K Ca and MG found in impure form?
Metals like Na, K, Ca and Mg are never found in their free state in nature because metals are very reactive elements. So, it combine with other non metal to complete its octet, so these are found in impure form. Thus, answer is correct. Was this answer helpful?
Why can’t carbon reduce the oxides of Na and MG?
Answer: Sodium and magnesium have higher affinity towards oxygen than towards carbon because these are highly reactive metals. Hence, carbon cannot reduce the oxides of Na or Mg. NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state.
Why can’t carbon reduction be used to prepare metals?
Metals like Na, Ca, Mg, Al etc, which are high up in the activity series are electropositive elements and possess a high affinity for oxygen. So their oxides are very much stable and cannot be reduced with common reducing agents like carbon. So carbon reduction process cannot be applied to prepare these metals.
What happens when aluminium is dipped in nitric acid?
Answer: When aluminium is dipped in nitric acid a layer of aluminium oxide is formed on the metal. This happens because nitric acid is a strong oxidizing agent. The layer of aluminium oxide prevents further reaction of aluminium. Due to this, the reactivity of aluminium decreases.