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Assertion : Helium has the highest valu...

Assertion : Helium has the highest value of ionisation energy among all the elements known
Reason : Helium has the highest value of electron affinity among all the elements known

A

Both assertion and reason are true and reason is not the correct explanation for the assertion

B

Both assertion and reason are true but the reason is not the correct explanation for the assertion

C

Assertion is true and the reason is false

D

Both assertion and the reason are false

Text Solution

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The correct Answer is:
A, C, D
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SURA PUBLICATION-SURA'S. MODEL QUESTION PAPER-3-PART-D
  1. Assertion : Helium has the highest value of ionisation energy among a...

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  2. (a) Calculate the number of atoms/molecules present in the following: ...

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  3. (a) Calculate the number of atoms/molecules present in the following: ...

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  4. (a) Calculate the number of atoms/molecules present in the following: ...

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  5. (a) Calculate the number of atoms/molecules present in the following: ...

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  6. (b) (i) The effect of uncertainty principle is significant only for mo...

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  7. (b) (ii) How does the Bohr theory of the hudrogen atom differ from tha...

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  8. (a) Define hydrogen bond and it types.

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  9. State the third law of thermodynamics.

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  10. (ii) Orbits are also called as stationary states. Say whether the abov...

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  11. (a) (i) Radius of a cation is smaller then the parent atom. Account fo...

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  12. (ii) I.E increases as we move across the period but Ionisation enthalp...

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  13. (b) Explain the following observations (a) Aerated water bottles are...

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  14. (b) Explain the following observations (b) Liquid ammonia bottle is...

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  15. (b) Explain the following observations (c) The tyre of an automobil...

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  16. (b) Explain the following observations (d) The size of a weather bal...

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  17. (a) Give a detailed account on the different mechanisms followed in el...

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  18. (b) (i) Why do you classify mesomeric effect (M- effect ) into .^(+)M ...

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  19. (ii) Why type of mesomeric effect is observed in phenol ? Explain.

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  20. (a) Describe Fajan's rule

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  21. (b) (i) When does a non-ideal solution is said to show a negative devi...

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