CTET 2 Math and Science Jan 2012 Paper

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Question : 81 of 120

Marks: +1, -0

When carbon dioxide is passed through clear lime water solution, it turns milky. The milky appearance of lime water is due to

curdling of milk due to lime in lime water
presence of impurities in lime water
presence of insoluble calcium carbonate
presence of soluble calcium carbonate

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