Kanika takes a burning substance and collects the evolved vapours in a test tube, making sure that they do not escape. A small amount of water is added to the test tube. To the solution obtained, a few drops of blue litmus solution are added. The litmus solution turns red. Which of the following could be the burning substance?
Dear student, Answer: The burning substance of S. Solution must be acidic because it turns blue litmus red. Oxides are formed on burning metals and non-metals. Oxides formed by non-Metals are acidic. Therefore, the burned substance must be a non -metal. Mg and Na are metals, S is a non-Metal. So, Kanika burned S. Regards,