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Assertion: The atomic radii of calcium i...

Assertion: The atomic radii of calcium is smaller than sodium
Reason: Calcuim has a lower nuclear charge than sodium.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If the assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Calcium has a higher nuclear charge than sodium.
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Knowledge Check

  • Assertion : Ionic radius of Na^+ is smaller than Na Reason : Effective nuclear charge of Na^+ is higher than Na

    A
    If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
    B
    If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
    C
    If Assertion is true statement but Reason is false.
    D
    If both Assertion and Reason are false statements.

  • Assertion (A) : The first IE of Be is greater than that of B Reason (R ) : 2p orbitals is lower in energy than 2s

    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

  • Gallium has smaller atomic radius than aluminium because of

    A
    Poor shielding power of `d` electrons of `Ga` atom
    B
    Poor shielding power of `s` electrons of `Ga` atom
    C
    Greater shielding power of `s` electrons of `Al` atom
    D
    Greater shielding power `d` electrons of `Ga atom.