Which of the following orders are correct for first ionization potentials?

Ba < Sr < Ca

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Ga < Tl < B

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C < O < N

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Mg < Al < Si

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Solution

The correct options are
A Ba < Sr < Ca
B Ga < Tl < B
C C < O < N
$\to$ I.E. generally decreases down the group
B > Tl > Ga $\to$ This is because of the poor shielding of d and $f - e^{-}$
N > O > C $\to$ This is because of the extra stability of half-filled atomic orbitals in N.

Suggest Corrections

Similar questions

(1) B a < S r < C a

(2) S^{2 -} < S < S^{2 +}

(3) C < O < N

(4) M g < A l < S i

B a < S r < C a

S^{2 -} < S < S^{2 +}

C < O < N

M g < A l < S i

I

A l > S i > P > C l

I I

B e < M g < C a < S r

I I I

I < B r < C l < F

I V

{N a}^{+} < {M g}^{2 +} < {A l}^{3 +} < {S i}^{4 +}

The first ionization potential of Na, Mg, Al & Si are in the order

N a, M g, A l

S i

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