Q34 of 60 Page 1

What happens when acetic acid is added in a solution of NaCO3 in a test tube. Write the equation for detecting the gas evolved.

When acetic acid is added to NaHCO3 solution, and when a burning splinter is brought near the mouth of each test tube, the splinter would be extinguished due to the evolution of carbon dioxide gas with brisk effervescence from the test tube.



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32

Study the following statements:

I. Wings of birds and wings of bats are homologous organs.


II. Wings of birds and wings of insects are modified forelimbs.


III. Wings of birds and wings of insects are analogous organs.


IV. Wings of birds and forelimbs of horse are homologous organs.


The correct statements are:

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