maria collected the gas given off by a glowing piece of charcoal . the gas was then bubbled through a small amount of colorless limewater . part of maria's report stated . after the gas was put into the jar the lime water gradually changed to milky white color .the statment is

(an observation)

Yes, the statement is an observation. It describes the change in color of the limewater from colorless to milky white after the gas was bubbled through it.

Yes, the statement "After the gas was put into the jar, the limewater gradually changed to a milky white color" is an observation. It describes a visual change that occurred during the experiment.

Correct (the statement is an observation).