Chemistry Chapter 16 (8) Short Questions Class 10 2024

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Class 10 Chemistry Chapter 16 Notes

Post TopicShort Questions
Book CodeChemistry
Class9th Class
Chapter/FullChapter 8
BoardPunjab Board

Class 10 Chemistry Chapter 16 Short Questions

  • Metallurgy is a technique by which metals are extracted from their ores.
  • Concentration is a separating technique in which a mineral is separated from gangue.
  • Sodium carbonate is manufactured by Solvay’s process. The raw materials used in this process are sodium chloride, carbon dioxide, and ammonia.
  • Ammonical brine is prepared by dissolving ammonia gas in sodium chloride
  • solution. When this solution is carbonated; first NH4HCO3 forms, which reacts with NaCI to form NaHCO3.
  • NaHCO3 on heating produces Na2CO
  • Urea is manufactured from ammonia and carbon dioxide. First Ammonia and
  • carbon dioxide react to form ammonium carbamate. On evaporation, it dehydrates to form urea.
  • Petroleum is a complex mixture of hydrocarbons. It forms by the decomposition of dead animals and plants buried under the Earth’s crust.
  • Crude oil is pumped out and then refined in the refineries. Refining is carried out by fractional distillation on heating crude oil at 400°C.
  • The important fractions of petroleum are; petroleum gas, petroleum ether, petrol, kerosene oil, diesel, and fuel oil.
  • The residual oil is heated above 400°C to produce lubricants, paraffin wax, asphalt, and petroleum coke.

Important Short Questions

  • What role is played by pine oil in the froth flotation process?
  • Name the various metallurgical operations.
  • How is roasting carried out?
  • Explain the process of electrorefining.
  • What are the advantages of Solvay’s process?
  • What is the principle of Solvay’s process?
  • What happens when ammonical brine is carbonated?
  • How NaHCO3 is converted to Na2CO3?
  • How is ammonia recovered in the Solvay’s process?
  • How is ammonia prepared for the synthesis of urea?
  • Describe the formation of petroleum.
  • What is the refining of petroleum and how is it carried out?
  • Give use of kerosene oil?
  • Describe the difference between diesel oil and fuel oil.
  • Write down the names of four fractions obtained by the fractional distillation of residual oil.
  • What is the difference between crude oil and residual oil?
  • Which petroleum fraction is used in dry cleaning?
Chemistry Questions
Chemistry Short Questions


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