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A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He makes the following observations: (1)I. A

colourless and odourless gas evolves with a brisk effervescence.II. The gas turns lime water milky when passed through it.III. The gas burns with an explosion when a burning splinter is brought near it.IV. The gas extinguishes the burning splinter that is brought near it.The correct observations are:(A) I, II, and III(B) II, III and IV(C) III, IV and I(D) IV, I and II


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