Advertisements
Advertisements
Question
Write the name.
Metals which are amphoteric in nature.
Advertisements
Solution
Metals which are amphoteric in nature- Aluminium (Al), zinc (Zn)
APPEARS IN
RELATED QUESTIONS
Name two metals which are found in nature in the free state.
In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte?
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Give two uses of bronze.
Name two metals which are highly resistant to corrosion.
Name three other metals which are extracted in a manner similar to sodium.
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Manganese metal is extracted from manganese dioxide by a reduction process by making use 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.
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.
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Give the chemical formula of :
Bauxite
Define the term:
Flux
Define the term:
Slag
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.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
The poorest conductor of heat among metals is ____________.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
Which of the following ore is concentrated by the Froth floatation process?
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
