मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Explain the Term of Metallurgy . - Science and Technology 1

Advertisements
Advertisements

प्रश्न

Explain the term of Metallurgy .

 

Advertisements

उत्तर

. Metallurgy: The various processes involved in the extraction of metals from its ores and refining is called metallurgy.
The major steps involved for the extraction of a metal from its ore are:
(i) Concentration of ores (or enrichment of ore)
(ii) Conversion of concentrated ore into metal
(iii) Refining (purification) of impure metal

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 8: Metallurgy - Exercises [पृष्ठ १०९]

APPEARS IN

बालभारती Science and Technology 1 [English] Standard 10 Maharashtra State Board
पाठ 8 Metallurgy
Exercises | Q 4.1 | पृष्ठ १०९

संबंधित प्रश्‍न

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 a more reactive metal.

Give the effect of heat on their: carbonates


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.


Name the processes involved in refining of ores.


Name:

(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen


On which factors does the purification of metals depend?


`Ag2O`................................


`MnO_2 + 4Al`  …………….


Give the ionization reactions of electrolyte used in Hall’s process. write the reaction at the cathode and the anode. Why the anode has to be replaced in this process?


Where are the cathode and anode in the electrolytic cell? Name the material used for these?


How is it removed?


Which metal is used for:

lithographic plates for printing


Name the following:

Name an allotrope of a non-metal that allows electricity to pass through it.


Match the columns.

Group A Group B
1. ZnS a) Copper Sulphide
2. HgS b) Bauxite
  c) Cinnabar
  d) Zinc blend

Write scientific reason.

Magnetic separation method is used to separate the magnetic ingredients in the ores.


Distinguish between:

Froth floatation - Leaching


Observe the figure and name and explain in brief the following method:


Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal K-1 mol-1).


Explain the following term:

Metallurgy


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×