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प्रश्न
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.
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उत्तर
- Two metals that react with water: Potassium, sodium
- Two moderately reactive metals: Zinc, iron
- 1. Most highly reactive metal: Potassium
2. Most less reactive metal: Gold
APPEARS IN
संबंधित प्रश्न
Name the following:
The property possessed by metals by which they can be beaten into sheets.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Define the term gangue.
Explain giving equation, what happens when:
A mixture of Cu2O and Cu2S is heated.
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
An ore of manganese metal is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
- What are A and B?
- Identify C and D.
- What will be the action of C on litmus solution? Why?
- State whether element B is a solid, liquid or gas at room temperature.
- Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
In electrolytic reduction of alumina _______ is used as a cathode.
Find the odd one out and give its explanation.
Write the name.
Strongly heating carbonate ores in insufficient air -
Right or wrong sentence?
In the electrolytic dissipation method of alumina, the lining of graphite acts as an anode.
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
