A research study group to determine the structure and properties of a waxy organic substance A, they intend to use the means of traditional experiments combined with modern technology to carry out

Test Answer: (1) (2) ① A in the clarified lime water becomes turbid (or the clarified lime water in the gas-washing flask becomes turbid) ② D in the clarified lime water becomes turbid (or the clarified lime water in the beaker becomes turbid) ③ dry and cold beaker wall beads of water (or C beads of water on the inside of the beaker wall) (3) Ca (OH) 2 solubility is small, the A clarified lime water may not be able to water gas CO2 fully absorption, thus interfering with the test of CO; between A, B connected in order to the gas washing device equipped with NaOH solution, clarified lime water (or will come out of A out of the gas in order through the NaOH solution, clarified lime water)