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Home » Class 8 » Micro-organism:Friend and Foe » Commercial use of micro-organism

Commercial use of micro-organism

Last Updated on June 30, 2020 By Mrs Shilpi Nagpal 7 Comments

Question 1 Which micro-organism is used for the large scale production of alcohol?

Question 2 Define the term fermentation?

Question 3 Name the scientist who discovered fermentation?

Question 4 Describe how sugar is converted into alcohol?

Question 5 What is vinegar?

  • NCERT Solutions Class 8 Science

Commercial use of micro-organism

They are used for the large scale production of alcohol and acetic acid(vinegar)

1) Yeast is the micro-organism which is used for large production of alcohol.This alcohol is then used in making of wine,beer,whisky as well as industrial spirit.

2) Yeast is capable of converting sugar into alcohol.The sugar for making alcohol comes from substances such as cane juice and fruit juice,or from substances such as maize,barley,rice etc.

Fermentation

The process of conversion of sugar into alcohol by action of yeast is called fermentation.

Fermentation was discovered by Louis Pasteur in 1857.

A dilute solution of acetic acid is called vinegar.Bacteria can turn alcohol into acetic acid.

First alcohol is made by using yeast.The acetobacter bacteria are added to alcohol and air is bubbled through it.In the presence of oxygen,bacteria converts alcohol into acetic acid.

See other topics from Chapter 2 Micro Organisms Friend and Foe
  • Micro-Organisms
  • Groups of Micro Organism
  • Where do Micro Organism Live
  • Useful Micro organism
  • Making of Curd and Bread
  • Medicinal Use of Micro oragnaism
  • Increasing Soil Fertility
  • Cleaning the Environment
  • Harmful Micro Organism
  • Carriers of Disease causing micro organism
  • Disease Causing Micro organisms in Animals
  • Disease Causing Micro-Organism in Plants
  • Food poisoning
  • Preservation of Food
  • Preservation by sun-drying, Heating, Cooling
  • Preservation by Deep Freezing,Common Salt, Sugar
  • Preservation of food by mustard oil and Vinegar, Chemicals, Pasteurisation, Air-tight Packets
  • Nitrogen Fixation
  • Nitrogen Cycle

Filed Under: Class 8, Micro-organism:Friend and Foe Tagged With: acetobacter, alcohol, commercial use of micro-organism, fermentation, louis pasteur, yeast

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

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Comments

  1. Sheela says

    January 5, 2019 at 10:35 am

    It was so useful for my child

    Reply
    • Rahat says

      June 18, 2019 at 7:49 pm

      It is very nice . And it helps me to complete my ppt .. Thank you

      Reply
  2. Reuben says

    November 4, 2019 at 7:25 pm

    Thanks a lot helped me in my exams

    Reply
  3. Meghana .C says

    June 4, 2020 at 9:58 am

    Tq very much madam

    Reply
  4. JAYA SHREE says

    July 23, 2020 at 4:49 pm

    Thanks for your shilpi mam you have helped me

    Reply
  5. Rushitha says

    July 30, 2020 at 8:51 pm

    thanq so much mam……it helped me alot for my online exams…

    Reply
  6. Irfana says

    August 11, 2020 at 6:51 pm

    It is useful for me Thanks

    Reply

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