CBSE Class 10 Science 2019 Delhi Set 1

Question : 25 of 28

Marks: +1, -0

In the experimental set up to show that "

{\CO}_2

is given out during respiration", name the substance taken in the small test tube kept in the conical flask. State its function and the consequence of its use.

Solution:

The chemical kept in the test tube is

{\KOH}-

Potassium Hydroxide. The function of this chemical is to absorb the vapours of

{\CO}_2

.
Consequence : The water level rises in the test tube dipped in the beaker and partial vacuum is created.

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