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प्रश्न
Which of the following pairs will give displacement reactions?
विकल्प
NaCl solution and copper metal
MgCl2 solution and aluminium metal
FeSO4 solution and silver metal
AgNO3 solution and copper metal.
उत्तर
AgNO3 solution and copper metal.
Explanation:
AgNO3 solution will cause a displacement reaction with copper (Cu) because copper is placed above silver in the activity series.
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संबंधित प्रश्न
Name the following: Main ore of aluminium.
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?
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Name one metal which is extracted by reduction with heat alone.
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 |
Define the term ore.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Which method of refining is used to get 99.8% pure aluminium?
What is galvanized iron.
Name:
The allotrope of the non-metal carbon which conducts electricity.
In electrolytic reduction of alumina _______ is used as a cathode.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
