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(A) : In the separation of inert gases, ...

(A) : In the separation of inert gases, by Dewar's method He gas does not absorbed on activated charcoal
(R ) : Among noble gases helium has less atomic size
The correct answer is

A

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

B

Both (A) and (R ) are true and (R ) is not correct explanation of (A)

C

(A) is true but (R ) is false

D

(A) is false but (R ) is true

Text Solution

Verified by Experts

The correct Answer is:
A
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Only the surface atoms in an adsorbent, play an active role in adsorption. These atoms posses some residual forces like vander Waal's forces and chemical forces. In the process of adsorption, weak adsorbate is substituted by strong adsorbate. Activated charcoal used in gas mask is already exposed to the atmospheric air, so the gases and water vapours in air are adsorbed on its surface. When the mask is exposed to chlorine atmosphere, the gases are displaced by chlorine. Porous and finely powdered solids, e.g., charcoal and Fuller's earth adsorb more as compared to the hard non-porous material. It is due to this property that the powdered characoal is used in gas masks. In general, easily liquefiable gases like CO_2, NH_3, Cl_2 , and SO_2 etc., are adsorbed to a greater extent than the elemental gases, eg., H_2, N_2, O_2, He , etc. Which of the following gases will substitute O_2 from adsorbed charcoal

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AAKASH SERIES-NOBLE GASES-LEVEL - I (EXERCISE - I)
  1. The use of pyrogallol in Ramsay - Rayleigh second method is

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  2. Coconut charcoal at 93K in used to separate

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  3. ......... is the compound which can remove both nitrogen and oxygen of...

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  4. Ramsay - Rayleigh second method is based on

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  5. Regardint the isolation of noble gases from atomosphric air by Ramsay...

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  6. The following are some statements regarding Claude's method I : The ...

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  7. (A) : Helium was discovered in chromosphere of the sum ( R ) : D3 ...

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  8. (A) : In the separation of inert gases, by Dewar's method He gas does ...

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  9. The first ionization energy of neon is 2080.7 KJ/mole. The first of io...

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  10. The noble gas which behaves abnormally in liquid state is

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  11. The solubility of noble gases in water shows the order :

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  12. The compound which will not exist is

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  13. The ratio of sigma and pi bonds present in XeO4 molecule is

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  14. Which of the following compound is both hygroscopic and explosive

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  15. In XeF6 molecule, Xenon atom undergoes

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  16. (A): Among noble gases Xe can readily form compounds with fluorine ...

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  17. In XeF4 molecule

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  18. The explosive compounds are

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  19. The bond angle in XeO3 molecule decreases from 109^@28^1 to 1030^@ due...

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  20. The compound in which there is no lone pair on xenon atom is

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