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Subject :NSO    Class : Class 7

Kanav took two test tubes marked as I and II. In test tube I, he put calcium carbonate and hydrochloric acid while in test tube II, he put zinc granules and hydrochloric acid. He passed the gas coming out from both the test tubes through lime water. What would be his observations?


AThe gas coming out from test tube I turned lime water milky.
BThe gas coming out from test tube II turned lime water milky.
CThe gases coming out from both the test tubes turned lime water milky.
DNone of these


we should know which one produces co2 gas as it makes lime water milky

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