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Statement I : Balloons made by nylon fil...

Statement I : Balloons made by nylon films are better for containing helium than the conventional rubber balloons.
Statement II : R.M.S. velocity of helium is very high. So helium atom can effuse out through rubber balloons.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is not a correct explanation of A

C

A is true but R is false

D

A is false but R is true

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements provided in the question, we will break down the reasoning step by step. ### Step 1: Understand Statement I **Statement I:** "Balloons made by nylon films are better for containing helium than the conventional rubber balloons." - **Explanation:** This statement suggests that nylon balloons are more effective at holding helium gas compared to rubber balloons. ### Step 2: Understand Statement II **Statement II:** "R.M.S. velocity of helium is very high. So helium atom can effuse out through rubber balloons." - **Explanation:** The root mean square (R.M.S.) velocity is a measure of the average speed of gas particles. Helium, being a light gas with a low molar mass, has a high R.M.S. velocity. This means that helium atoms move quickly and can escape through the tiny pores in rubber balloons more easily than through nylon films. ### Step 3: Relate the Two Statements - The high R.M.S. velocity of helium leads to a higher rate of effusion (the process of gas escaping through a small hole). Since rubber is more permeable to gases compared to nylon, helium will escape more quickly from rubber balloons. ### Step 4: Conclusion - **Assertion:** Statement I is true because nylon films are less permeable to helium than rubber, making them better for containing helium. - **Reason:** Statement II is also true because the high R.M.S. velocity of helium allows it to effuse out of rubber balloons more rapidly. ### Final Answer Both Statement I and Statement II are true, and Statement II correctly explains Statement I. ---
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