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प्रश्न
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
उत्तर
- The arrangement of metals in the increasing or decreasing order of reactivity is called the reactivity series of metals.
- Iron nails react with silver nitrate solution to form ferrous nitrate and silver. Silver nitrate solution is colourless while the colour of ferrous nitrate solution is brown. Hence, the solution will turn brown.
- When an iron metal reacts with silver nitrate solution, a displacement reaction occurs.
- Zinc rod reacts with silver nitrate solution to form zinc nitrate and silver.
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संबंधित प्रश्न
Name the following: Main ore of aluminium.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Name one metal which is extracted by reduction with heat alone.
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
Name the metal which is extracted from haematite ore.
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Define the following term.
Gangue
Give the chemical formula of :
Cryolite
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
The electrolysis of alumina involves the use of fluorspar and cryolite to increase the melting point.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give the reason why the above reaction is known as a thermite reaction.
