Question

4. Carbon dioxide gas liberation can be tested with:
a) Burns with pop sound
b) Makes the flame burn more brightly
c) Turns Ca(OH)2 milky
d) Turns the iodine bluish black​

Answer 1

Answer:

The most effective way to test for CO2 is to bubble the gas through "limewater", a diluted solution of calcium hydroxide (slaked lime). When you bubble carbon dioxide through the solution, it forms a solid precipitate of calcium carbonate – chalk or limestone

Answer 2

• c) Turns Ca(OH)2 milky.

Hope it helps you