Multiple choice

Which of the following statements is false about a compound, which is combined in the fixed proportion?

  1. 4 grams of hydrogen combine with 32 grams of oxygen to give 36 grams of water.

  2. In the molecule of carbon dioxide, carbon and oxygen are present in fixed ratio of 3 : 8 by mass.

  3. In the molecule of water, hydrogen and oxygen are present in the ratio of 1 : 8.

  4. 12 grams of carbon combine with 32 grams of oxygen to give 40 grams of carbon dioxide.

  5. In the molecule of carbon monoxide (CO), the ratio of carbon and oxygen is 3 : 8.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

In the molecule of carbon monoxide (CO), the ratio of carbon and oxygen is 3 : 4,  but not 3 : 8 [CARBON : OXYGEN = 12 : 16   = 3 : 4]

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