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प्रश्न
Explain concept with example/explain with the help of a balanced equation.
Minerals
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उत्तर
- Most metals being reactive do not occur in nature in the free state but are found in a combined state as their salts such as oxides, carbonates, sulphides, and nitrates.
- However, some unreactive metals like silver, gold, platinum, generally occur in a free state.
- The compounds of metals that occur in nature along with the impurities are called minerals.
- For example, bauxite is a mineral of aluminium.
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संबंधित प्रश्न
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is more reactive metal.
Give the effect of heat on their: hydroxide
Metal A has an electronic configuration of 2, 8, 1 and metal B has 2, 8, 8, 2 which is a more reactive metal.
Give the effect of heat on their: nitrates
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 terms:
(a) flux
What do you observe when hydrogen is passed over heated copper oxide?
`ZnCO_3`
..............................
`2Pb(NO3)_2`
.........................
`2Cu_2O +Cu_2S`
......................
Where are the cathode and anode in the electrolytic cell? Name the material used for these?
Which metal is used for:
making pipes, buckets, water tanks,
Explain the term of Metallurgy .
In Wilfley table method to separate particles of gangue _______ method is used.
Cassiterite is a copper ore.
Explain concept with example/explain with the help of a balanced equation.
Gangue
Explain the froth floatation method with a neat labelled diagram.
Explain the smelting process.
Which of following metals occurs in native state?
In leaching of alumina from bauxite by Bayer's process, then ore is treated with ______.
Explain the following term:
Metallurgy
After partial roasting, the sulphide of copper is reduced by ______.
