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Virat
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Asked: 2025-07-31T04:59:01+00:00 In:

Observe the set-up given in Fig. 2.15 and answer the following questions: (i) What happens to the sugar solution in flask A? (ii) What do you observe in test tube B after four hours? Why do you think this happened? (iii) What would happen if yeast was not added in flask A?

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(i) Sugar is fermented in flask A.
(ii) Test tube B shows bubbles or gas due to carbon dioxide.
(iii) Without yeast, fermentation doesn’t occur and no gas forms, so the test tube stays unchanged.

class 8 science chapter 2 the invisible living world beyond our naked eye question answer

Class 8 Science Curiosity Textbook Chapter 2 The Invisible Living World – Beyond Our Naked Eye question answer

class 8 all chapter science curiosity question answer@ tiwari academythe invisible living world: beyond our naked eye class 8 chapter 2 science question answerwhat happens to the sugar solution in flask a?
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    1 Answer

    1. (i) In flask A, yeast ferments the sugar, releasing carbon dioxide.
      (ii) In test tube B, gas bubbles appear, showing the presence of CO₂.
      (iii) Without yeast in flask A, fermentation doesn’t happen, so no gas is released and the test tube B remains unchanged. This experiment demonstrates that yeast is essential for fermentation and gas production.

       

      For more NCERT Solutions for Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye Extra Questions & Answer:

      https://www.tiwariacademy.com/ncert-solutions/class-8/science/

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