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Sulphur

Which of the ...

Question

Which of the following statements are true :

Ability of oxygen to stabilize high oxidation state of transition elements exceeds that of fluorine

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In the electronic configuration in ground state of Cr, Aufbau rule is violated but not in carbon

(2 s^{2} 2 p^{2} n o t 2 s^{1} 2 p^{3})

because energy difference between 3d & 4s is much less.

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M n^{2 +}

which has 5 unpaired electrons still is very feebly coloured (or) colourless in aqueous medium

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Melting point of Cr is more than that of Fe

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Solution

The correct options are
A Ability of oxygen to stabilize high oxidation state of transition elements exceeds that of fluorine
B In the electronic configuration in ground state of Cr, Aufbau rule is violated but not in carbon $(2 s^{2} 2 p^{2} n o t 2 s^{1} 2 p^{3})$ because energy difference between 3d & 4s is much less.
C $M n^{2 +}$ which has 5 unpaired electrons still is very feebly coloured (or) colourless in aqueous medium
D Melting point of Cr is more than that of Fe
Conceptual

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