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(A) Helium is used in modem diving appar...

(A) Helium is used in modem diving apparatus
(R) Helium is chemically inert

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:
B
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AAKASH SERIES-NOBLE GASES-OBJECTIVE EXERCISE - 4 (ASSERTION (A) AND REASON (R ) TYPE QUESTIONS)
  1. (A) 1 lit of dry air contains 10ml of noble gas mixture (R) The a...

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

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

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

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

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

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

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

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

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

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  11. (A) The study of radon is difficult among noble gases (R) Radon is...

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  12. (A) Helium is used in gas cooled nuclear reactors (R) Helium has h...

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  13. (A) Helium is used in modem diving apparatus (R) Helium is chemical...

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  14. (A) Neon bulbs are used in botanical gardens (R) Neon is lighter t...

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  15. (A) Liquid helium can be used as a cryogenic liquid (R) Liquid he...

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  16. (A) XeF4 reacts with SbF5 to give a salt [Sb F4]^(+) [XeF5]^- (R) ...

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  17. (A) 'Ar' is used for arc welding of metals or alloys. (R) Ar prov...

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  18. (A) Liquid helium is used in NMR spectrometers and MRI systems (R...

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  19. On dissolution of Xenates [HXeO4]^- in alkaline solution perxenate an...

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  20. (A): The name helium is made after sun (R): Helium is abundant gas ...

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