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प्रश्न
Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)
Crushing of the ore into a fine powder.
उत्तर
The process of crushing ores into a fine powder in big crushers and ball mills is known as pulverisation.
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संबंधित प्रश्न
Choose the correct answer from the options given below:
The main ore used for the extraction of iron is
A. Haematite
B. Calamine
C. Bauxite
D. Cryolite
Choose the correct answer from the options given below:
Aluminum powder is used in thermite welding because
A. It is a strong reducing agent
B. It is a strong oxidizing agent
C. It is corrosion resistant
D. It is a good conductor of heat
State amalgam use with an example.
Give composition and uses of the following alloys. Mention the reason for its use.
Brass
Give composition and uses of the following alloys. Mention the reason for its use.
Bronze
Complete and balance the following equation:
Fe2O3 + → Al2O3 +
Complete and balance the following equation :
Al + NaOH →
Name the ore of zinc containing its sulphide.
Name the following.
The property possessed by metals by which they can be beaten into sheets.
Explain concept with example/explain with the help of a balanced equation.
Ores
