Advertisements
Advertisements
प्रश्न
Explain concept with example/explain with the help of a balanced equation.
Gangue
Advertisements
उत्तर
- The unwanted impurities of sand, soil, rocky substances, etc., present in the ore are called gangue.
- Ores are taken out from the mines and the gangue is usually separated from the ore at the site itself by various methods.
- The process of separating gangue from the ores is called the concentration of ores.
- For example, bauxite ore contains impurities of silica (SiO2), ferric oxide (Fe2O3) and titanium oxide (TiO2). These impurities are called gangue.
APPEARS IN
संबंधित प्रश्न
Give the importance of the following for living beings:
Carbon
Why are alkali metals kept in kerosene oil?
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Identify A and B and give their reactions with dil HCL and dil H2SO4 ?
A student has been collecting silver coins and copper coins. One day she observed a black
coating on silver coins and a green coating on copper coins. Which chemical phenomenon is
responsible for these coatings? Write the names of black and green coatings.
Explain the following term:
Gangue
Explain the following terms:
(c) slag
What do you observe when hydrogen is passed over heated copper oxide?
`Ag2O`
................................
`2AgNO_3`
...........................
Why is flux used in the blast furnace?
Complete the following flow chart and answer the questions below:
i) In which method pine oil is used?
ii) Explain what method of concentration in brief.
Match the columns.
| Group A | Group B |
| 1. ZnS | a) Copper Sulphide |
| 2. HgS | b) Bauxite |
| c) Cinnabar | |
| d) Zinc blend |
Complete flow chart given below.
The chemical name of rust is ______.
State the reason for the addition of caustic alkali to bauxite ore during the purification of bauxite.
Zirconium is refined by ____________.
Limestone is used as a flux in the extraction of ______.
A process of extracting metals from aqueous solutions of their salts using suitable reducing agents is called ______
