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Question
At the normal rate, calculate how many years it would take for the movement of molecules over a distance of 1 m within a plant by diffusion alone.
At the normal rate, calculate how many years it would take for the movement of molecules over a distance of 1 m within a plant by diffusion alone.
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Solution
The correct option is B Approximately 2 years
The diffusion is a process where molecules move independently depending on their concentration gradients. It also depends on the size of molecules. The molecules move from higher concentration of solutes to lower concentration of solutes. Around 2.5 seconds are taken for a molecule to move a distance of 50 picometer. Hence, to travel 1 m or 1 x 10−12 picometer, it will take 1 x 10−12 x 2.5 / 5 = 5 x 10 −11 seconds. In a year, there is 3.2 x 10 7 seconds. Hence, it will take approximately 2 years for movement of molecules over a distance of 1 m withing a plant by diffusion alone.Thus, the correct answer is 'Approximately 2 years.'
The diffusion is a process where molecules move independently depending on their concentration gradients. It also depends on the size of molecules. The molecules move from higher concentration of solutes to lower concentration of solutes. Around 2.5 seconds are taken for a molecule to move a distance of 50 picometer. Hence, to travel 1 m or 1 x 10−12 picometer, it will take 1 x 10−12 x 2.5 / 5 = 5 x 10 −11 seconds. In a year, there is 3.2 x 10 7 seconds. Hence, it will take approximately 2 years for movement of molecules over a distance of 1 m withing a plant by diffusion alone.
Thus, the correct answer is 'Approximately 2 years.'
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