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(A) : Helium was discovered in chromosph...

(A) : Helium was discovered in chromosphere of the sum
( R ) : `D_3` line is observed along with `D_1 and D_2`1 in the solar spectrum
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

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The correct Answer is:
A
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AAKASH SERIES-NOBLE GASES-LEVEL - I (EXERCISE - I)
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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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