Four students performed an experiment of acetic acid with sodium carbonate (I), sodium hydroxide (II), sodium bicarbonate (III) and sodium chloride (IV) separately. Each one brought burning candle near the mouth of the test tube. The candle would not be extinguished near the mouth of the test tubes:(A) I and II (B) I and III(C) II and III (D) II and IV

Four students performed an experiment of acetic acid with sodium carbo

1.	Four students performed an experiment of acetic acid with sodium carbonate (I), sodium hydroxide (II), sodium bicarbonate (III) and sodium chloride (IV) separately. Each one brought burning candle near the mouth of the test tube. The candle would not be extinguished near the mouth of the test tubes:(A) I and II (B) I and III(C) II and III (D) II and IV
Answer» (D) II and IV