When an organic substance is fully combusted in oxygen, the ratio of water vapor to carbon dioxide is 1:1, and the conclusion can be concluded as () A. The ratio of C: H: O atoms in the organic molecule is 1:2:1 B. The number ratio of C: H atoms in the molecule is 1:2. C. Organic matter must contain O element D. It is impossible to judge whether the organic substance contains O element. When an organic substance is fully combusted in oxygen, the ratio of water vapor to carbon dioxide is 1:1, and the conclusion can be concluded as () A. The ratio of C: H: O atoms in the organic molecule is 1:2:1 B. The number ratio of C: H atoms in the molecule is 1:2 C. Organic matter must contain O element D. It is impossible to judge whether the organic substance contains O element.

When an organic substance is fully combusted in oxygen, the ratio of water vapor to carbon dioxide is 1:1, and the conclusion can be concluded as () A. The ratio of C: H: O atoms in the organic molecule is 1:2:1 B. The number ratio of C: H atoms in the molecule is 1:2. C. Organic matter must contain O element D. It is impossible to judge whether the organic substance contains O element. When an organic substance is fully combusted in oxygen, the ratio of water vapor to carbon dioxide is 1:1, and the conclusion can be concluded as () A. The ratio of C: H: O atoms in the organic molecule is 1:2:1 B. The number ratio of C: H atoms in the molecule is 1:2 C. Organic matter must contain O element D. It is impossible to judge whether the organic substance contains O element.

A. According to the law of conservation of mass, it can be judged that the organic substance contains carbon atom and hydrogen atom, but it can not be judged whether the organic substance contains oxygen element, so it is impossible to calculate the number ratio of carbon, hydrogen and oxygen atoms in the organic substance and determine the chemical formula, so A is wrong;
B. According to the meaning, it can be known that the amount ratio of water and carbon dioxide produced is 1:1, that is, the number of water and carbon dioxide produced is equal, and one water molecule contains 2 hydrogen atoms and one carbon atom contains one carbon atom, that is, the number ratio of carbon atoms and hydrogen atoms in the organic substance is 1:2, so B is correct;
C. Organic matter refers to the compound containing carbon, and the quality of the organic matter is not given, so it is impossible to judge whether the organic matter contains oxygen element, so C is wrong;
D. According to the law of conservation of mass, it can be judged that the organic substance contains carbon atom and hydrogen atom, but it can not be judged whether the organic substance contains oxygen element, so D is correct;
Therefore, BD.

NaCl solution, molten NaOH, which is electrolyte?

NaCl solution is a mixture, not an electrolyte, nor a non-electrolyte. Electrolyte, non-electrolyte must be a compound
Molten NaOH, the pure NaOH of a liquid, is an electrolyte

NaCl solution is a mixture, not an electrolyte, not a non-electrolyte. Electrolyte, non-electrolyte must be a compound
Molten NaOH, the pure NaOH of a liquid, is an electrolyte