Ajeet carried out an experiment in the science laboratory. He put liquid X into the flask in the set-up shown below.
After a week, the lime water in the test-tube turned chalky. What is liquid X most likely to be ?

Milk

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Cooking oil

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Boiling water

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None of these

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Solution

The correct option is A Milk
Raw or pasteurized whole milk was carbonated and contains approximately $0$ to $1000$ ppm of $C O_{2}$ . Therefore, when set still can release carbon dioxide.
This carbon dioxide released turns lime water chalky.
Cooking oil and boiled water does not release any carbon dioxide.
Hence, option $A$ is correct.

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Ajeet carried out an experiment in the science laboratory. He put liquid X into the flask in the set-up shown below.After a week, the lime water in the test-tube turned chalky. What is liquid X most likely to be ?

Ajeet carried out an experiment in the science laboratory. He put liquid X into the flask in the set-up shown below.
After a week, the lime water in the test-tube turned chalky. What is liquid X most likely to be ?