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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 'I' and 'II' are true. 'II' is correct explanation of 'I'.

B

Both 'I' and 'II' are ture. 'II' is not correct explanation of 'I'.

C

I' is true but 'II' is false.

D

I' is false but 'II' is true.

Text Solution

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The correct Answer is:
B
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NARAYNA-18TH GROUP ELEMENTS-LEVEL - I (C.W)
  1. Which one of the following is a correct pair with respect to molecular...

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  2. The number of lone pairs of electrons present on Xe in XeF(2) ?

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  3. The structure of XeF(6) is

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  4. Which of the following is planar ?

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  5. The gas mixture used to provide relief for the asthma patients in thei...

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  6. Beacon lights are obtained from

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  7. In ordinary incadescent and fluorscen lamps the gas filled along with ...

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  8. Helium - oxygen mixture is used by deep sea divers in preference to ni...

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  9. Which of the following noble gases is used in the treatment of cancer ...

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  10. Which one of the following statements regarding helium is incorrect?

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  11. Statement I : Balloons made by nylon films are better for containing h...

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  12. Statement I : Compared to other noble gases 'Xe' is chemically active....

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  13. Statement I : Noble gases have highest ionization energies in their re...

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  14. Statement I : Deep sea divers use He-O(2) mixture for breathing Stat...

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  15. Assertion :Solubility of noble gases in water decreases with increases...

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  16. Statement I : He - II has high viscosity and flows downward. Stateme...

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  17. Statement I : In sea diver gases, the nitrogen of normal air is replac...

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  18. Statement I : Xenon form fluorides. Statement II : Because 5d orbita...

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  19. Match the following. {:("List-I","List-II"),((A) XeF(4),(1) "Distort...

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  20. Matrix Matching. {:("List-I","List-II"),((A) "Gas Thermometers",(p) ...

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