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Assertion (A) : The atomic radil of the ...

Assertion (A) : The atomic radil of the electrons of oxygen family are smaller than the atomic radil of corresponding electrons of the nitrogen family
Reason (R ) : The members of oxygen family are all more electromagative and thus have lower value of nuclear tahn those of the nitrogen famoly

A

If both (A) and (R ) correct and (R ) is the correct explanation for (A)

B

If both (A) and (R ) correct and (R ) is the correct explanation for (A)

C

If (A) is correct but (R ) is incorrect

D

If (A) is incorrect but (R ) is correct

Text Solution

Verified by Experts

The correct Answer is:
C
Oxygen family has higher effective nuclear charge Hence , its atomic radil is smaller than nitrogen family .
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Assertion: The atomic radii of the elements of the oxygen family are smaller than the atomic radii of corresponding elements of the nitrogen family. Reason: The members of the oxygen family are more electronegative because they have lower values of nuclear charge, than those of the nitrogen family.

Statement-1: The atomic radii of the elements of the oxygen family are smaller than the atomic radii of the corresponding elements of the nitrogen family. Statement-2: The members of the oxygen family are more electronegative and thus have lower values of nuclear charge than those of the nitrogen family.

Assertion (A) : In Group 16, oxygen has highest electron affinity. Reason (R ) : Oxygen has the smallest atomic radius in the group.

Assertion (A) : An orbital cannot have more than two electrons, more over if an orbital has two electrons they must have opposite spins. Reason (R) : No elements in an atom can have same set of all four quantum numbers.

Assertion: magnitude of electron gain enthalpy of oxygen is less than that of fluorine but greater than that of nitrogen. Reason: Ionisation enthalpy order is as follows: N gt O lt E .

Assertion Nitrogen has higher first ionisation energy than oxygen. Reason Atomic radius of nitrogen is smaller than that of oxygen.

Given below are two statements labelled as Assertion (A) and Reason (R) Assertion (A): Electron gain enthalpy of oxygen is less than that of Flourine but greater than Nitrogen. Reason (R): Ionisation enthalpies of the elements follow the order Nitrogen gt Oxygen gt Fluorine Select the most appropriate answer from the options given below:

Assertion (A) :F atom has less electron than CI^(Theta) atom Reason (R ) : Additional electrons are repelled more effectively by 3p electron in CI atom than by 2p electron in F atom

CENGAGE CHEMISTRY-ATOMIC STRUCTURE-Exercises Assertion And Reason
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  2. Assertion (A) : The first IE of Be is greater than that of B Reason ...

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  3. Assertion (A) : The electronic configuration of nitrogen atom is repre...

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  4. Assertion (A) : The atomic radil of the electrons of oxygen family are...

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  5. Assertion (A) : For n = 3,l1 may be 0,1 and 2 and m may be 0, +- 1 and...

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  6. Assertion (A) : An orbital cannot have more than creat electron Reaso...

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  7. Assertion (A) : The configuration of B atom cannot be 1s^(2)2s^(2) Re...

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  8. Assertion (A) : The ionisation energy of N is more than that of O Re...

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  9. Assertion (A) : p orbital is dumb- bell shaped Reason (R ) :Electron...

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  10. Assertion (A) : A spectral line will be seen for 2p,-2p transition R...

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  12. Assertion (A) : In rutherford's gold foil experiment, very few alpha ...

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  14. Assertion (A) : Each electron in an atom has two spin quantum number ...

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  15. Assertion (A) : There are two spherical nodes in 3s orbital Reason (R...

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  16. Assertion (A) : In an atom, the velocity of electron in the higher orb...

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  17. Assertion (A) : If the potential difference applied to an electron is...

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  18. Assertion (A) :Angular momentum of 1s,2s,3s, ets all have spectrical ...

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