Question : When the bread rises and bakes, __________creates thousands of bubbles in the dough.
Option 1: phosphorus
Option 2: nitrogen
Option 3: oxygen
Option 4: carbon dioxide
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Correct Answer: carbon dioxide
Solution : The correct answer is carbon dioxide.
The yeast begins to feed on the dough's sugar molecules once it has been kneaded. The sugar molecules begin to break down into carbon dioxide and alcohol. As a result, the dough doubles during baking as a result of air pockets formed in the dough by the carbon dioxide in the bread.
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Question : Which one out of the following helps in burning?
Option 1: Oxygen
Option 2: Carbon monoxide
Option 3: Nitrogen
Option 4: Carbon dioxide
Question : The highest volume of gases in the lower atmosphere is comprised of
Option 1: Hydrogen
Option 2: Carbon dioxide
Option 3: Oxygen
Option 4: Nitrogen
Question : Dry ice is
Option 1: Solid ammonia
Option 2: Solid sulphur dioxide
Option 3: Dry carbon dioxide
Option 4: Solid carbon dioxide
Question : Which of the following gases shields the surface of the Earth from ultraviolet (UV) radiation from the Sun?
Option 1: Carbon monoxide
Option 2: Ozone
Question : Which of the following is not a greenhouse gas?
Option 1: Nitrogen
Option 2: Methane
Option 3: Carbon dioxide
Option 4: Nitrous oxide
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