In the experimental set up to show that is given out during respiration, name the substances taken in the small test tube kept in the conical flask. State its functions and the consequence of its use.
In the experimental set up to show that is given out during respiration, name the substances taken in the small test tube kept in the conical flask. State its functions and the consequence of its use.
The substances taken in the small test tube kept in the conical flask are KOH (potassium hydroxide) and CaO (calcium oxide). The function of KOH is to absorb CO2 and the function of CaO is to absorb water vapor. The consequence of their use is that they help to confirm that CO2 is given out during respiration.
Marking Scheme
- 1/1 for each substance
- 2/1 for each function
- 3/1 for the consequence
Hint
Recall the experimental set up to show that CO2 is given out during respiration.
Quick Oral Answer
The substances taken in the small test tube kept in the conical flask are KOH and CaO. KOH absorbs CO2 and CaO absorbs water vapor. Their use helps to confirm that CO2 is given out during respiration.
Analysis & Explanation
The question requires the student to recall the substances used in the experimental set up to show that CO2 is given out during respiration. The student should be able to identify the functions of KOH and CaO and the consequence of their use.
Common Mistakes
- 1Not mentioning both substances
- 2Not describing their functions
Interesting Facts
KOH is a strong base.
CaO is a strong base.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2019?
This question carries 2 marks in the CBSE Class 10 Science 2019 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Life Processes" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Respiration" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2019 paper?
This is a Short Answer question from Section E in the CBSE Class 10 Science 2019 paper.