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(A) Valency of xenon in second excited s...

(A) Valency of xenon in second excited state is two
(R) Xenon forms `XeF_2` in its second excited electronic state

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 the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-NOBLE GASES-OBJECTIVE EXERCISE - 4 (ASSERTION (A) AND REASON (R ) TYPE QUESTIONS)
  1. (A) Xenon tetrafluoride molecule is denoted as AB4E4, where E is a lo...

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  2. (A) First ionisation potential of helium is highest (R) The electro...

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  3. (A) Valency of xenon in second excited state is two (R) Xenon forms ...

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  4. (A) Boiling point of helium is least (R) Intermolecular forces of ...

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  5. (A) All the noble gases have ns^2 np^6 electronic configuration in the...

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  6. (A) Helium is regarded as the least volatile of all liquids. (R) ...

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  7. (A) Deep sea divers use helium-oxygen mixture for respiration (R)...

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  8. (A) Xenonmonoxytetrafluoride has square planar structure. (R) Xeno...

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  9. (A) Group 18 elements are called noble gases (R) group 18 elements...

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  10. (A) All noble gases occur in atmosphere (R) Among noble gases 'R' ...

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  11. (A) 1 lit of dry air contains 10ml of noble gas mixture (R) The a...

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  12. (A) Helium is present in radio active minerals like pitchblende, monaz...

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  13. (A) 1 mole Ra^226 on alpha disintegration will give 44.8 lit of gaseou...

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  14. (A) Noble gases have very high ionization enthalpies in periodic table...

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  15. (A) Noble gas elements have very low melting and boiling points (...

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  16. (A) The first noble gas compound synthesised is Xe[PtF6 ] (R) Io...

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  17. (A) XeF2 is a linear molecule (R) In XeF2 xenon undergoes sp^3d ...

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  18. The hydrolysis of XeF6 is not a redox reaction (R) XeF6 on comp...

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  19. (A) XeO3 is a colourless explosive solid (R) XeO3 has pyramidal ...

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  20. (A) Helium is preferred than hydrogen in filling ballons for meterolog...

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