What happens when excess of carbon dioxide gas is passed through lime water?

Practice MCQ for SSC, UPSC, RRB Exams

A. Lime water first turns milky and then colourless A.
B. Lime water turns bluish B.
C. Lime water turns milky C.
D. Lime water turns blackish D.

Correct Answer: A সঠিক উত্তর: A

Explanation ব্যাখ্যা

When an excess of carbon dioxide gas is passed through lime water, the initial milky appearance caused by the formation of calcium carbonate disappears. This is because the insoluble calcium carbonate reacts further with the excess CO2 and water to form soluble calcium bicarbonate.

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