Question

__________is the correct set up to pass CO₂ through lime water.

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Option D set up is correct.
Bacause the tube taking the $C{O}_2$ gas into the lime water should be immersed into the solution of lime water so that the $C{O}_2$ is passed through the lime water.
The other tube letting the gas out should not touch lime water since it is supposed to allow excess $C{O}_2$ that does not dissolve in lime water.