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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?
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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.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Give the name and chemical formula of one ore of copper.
Define the terms gangue.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its:
(a) oxide
(b) hydride
(c) sulphide
(d) carbonate
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
How many valence electrons are present in metals ?
How many valence electrons are present in non- metals?
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Answer the following question :
What is the difference between calcination and roasting.
Froth floatation process is generally used to concentrate ______ ores.
Answer the following question:
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum 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.
Iron is _______.
Explain concept with example/explain with the help of a balanced equation.
Roasting
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
