Third step of metallurgy is

  • crushing, grinding or pulverizing of the ore
  • concentration of the ore
  • extraction of metal
  • refining of metal

Which of the following is used as a chemical feedstock for making drugs, plastics, and other chemicals?

  • Liquid Petroleum Gas (LPG)
  • petrol
  • naphtha
  • kerosene

Number of carbon atoms per molecule in Petrol is

  • 1 to 4
  • 5 to 10
  • 8 to 12
  • 10 to 16

Number of carbon atoms per molecule in diesel is

  • 14 to 20
  • 20 to 50
  • 50 to 70
  • more than 70

What are the raw materials used in the Solvay process?

  • ammonia
  • brine
  • lime stone
  • all of above

The boiling point of bitumen is

  • 270 °C to 340 °C
  • 350 °C to 500 °C
  • 500 °C to 600 °C
  • more than 500 °C

Ore of zinc is called

  • galena
  • zinc blende
  • cinnabar
  • chromite

The boiling point of petrol is

  • below 20 °C
  • 170-120 °C
  • 35-70 °C
  • 270-340 °C

Ore of tin is called

  • galena
  • zinc blende
  • Cassiterite
  • silica

The second step of metallurgy is

  • crushing, grinding or pulverizing of the ore
  • concentration of the ore
  • extraction of metal
  • refining of metal

The process of converting minerals into oxides is called

  • smelting
  • reigning
  • roasting
  • Bessemerization

A solid deposit containing a sufficiently high percentage of a mineral to make extraction of metal economically feasible is called

  • metal oxide
  • gangue
  • ore
  • none of above

The third step of the Solvay process is

  • preparation of ammonical brine
  • carbonation
  • filtration
  • calcination

Which of the following is used as a lubricant for machines and engines?

  • diesel
  • lubricating oil
  • fuel oil
  • bitumen

Ore of lead is called

  • galena
  • zinc blende
  • cinnabar
  • chromite

Naturally occurring metallic compounds are called

  • metalloids
  • minerals
  • hard solids
  • soft solids

The last step of metallurgy is

  • crushing, grinding or pulverizing of the ore
  • concentration of the ore
  • extraction of metal
  • refining of metal

Number of carbon atoms per molecule in kerosene is

  • 1 to 4
  • 5 to 10
  • 8 to 12
  • 10 to 16

Process in which sodium carbonate is manufactured is called

  • calcination
  • metallurgy
  • Solvay process
  • carbonation

Raw materials for production of urea are

  • ammonia and carbon dioxide
  • oxygen and carbon dioxide
  • ammonia and oxygen
  • ammonia and phosphate
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