Advertisements
Advertisements
प्रश्न
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Advertisements
उत्तर
Ferric oxide reacts with aluminium to form iron and aluminium oxide. This reaction is known as the thermit reaction.
\[\ce{\underset{\text{Ferric oxide}}{Fe2O_{3(s)}} + \underset{\text{Aluminium}}{2Al_{(s)}} ->[Ignited] \underset{\text{Iron}}{2Fe_{(l)}} + \underset{\text{Aluminium oxide}}{Al2O_{3(s)}}+Heat}\]
APPEARS IN
संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
M is a metal above hydrogen in the activity series and its oxide has the formula M2O. This oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context, answer the following:
1) What kind of combination exists between M and O?
2)How many electrons are there in the outermost shell of M?
3) Name the group to which M belongs.
4) State the reaction taking place at the cathode.
5) Name the product at the anode.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Bronze is an alloy of copper and ______.
Name two metals which are always found in combined state.
An important ore of zinc metal is ______.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
How an ore is concentrated by froth floatation process?
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
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.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Extraction of moderately reactive elements is done by _______ and _______ method.
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
An alloy is
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
