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Standard XII

Chemistry

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Which of the ...

Question

Which of the following does not represent the correct order of the properties indicated?

N i^{2 +} > C r^{2 +} > F e^{2 +} > M n^{2 +}

(size)

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Sc > Ti > Cr > Mn (size)

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N i^{2 +} < C o^{2 +} < F e^{2 +} < M n^{2 +}

(unpaired electron)

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F e^{2 +} > C o^{2 +} > N i^{2 +} > C u^{2 +}

(unpaired electron)

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Solution

The correct option is A $N i^{2 +} > C r^{2 +} > F e^{2 +} > M n^{2 +}$ (size)
As we move along a period, size decreases so $N i^{+ 2}$ has lowest radius among
$N i^{2 +} < C r^{2 +} < F e^{2 +} < M n^{2 +}$ (size)
$C u^{+ 2}$ 1 2 3 4 5

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Similar questions

Q. Which of the following arrangments does not represent the correct order of the property stated against it?
(1)

V^{2 +} < C r^{2 +} < M n^{2} < F e^{2 +}

: paramagnetic behaviour
(2)

N i^{2 +} < C o^{2 +} < F e^{2 +} < M n^{2 +}

: ionic size
(3)

C o^{3 +} < F e^{3 +} < C r^{3 +} < S c^{3 +}

: stability in aqueous solution
(4)

S c < T i < C r < M n

: number of oxidation states

Q. The stabilities of coordination compounds containing the ions

C u^{2 +}, N i^{2 +}, C o^{2 +}, F e^{2 +}

and

M n^{2 +}

follow the order:

Q. Magnetic moments of

M^{2 +}

ions (divalent cations ) of 3d-series in the decreasing order is :

Z n^{2 +} > S c^{2 +} = C u^{2 +} > T i^{2 +} = N i^{2 +} > V^{2 +} = C o^{2 +} > C r^{2 +} = F e^{2 +} > M n^{2 +}

Is the above statement true?

Write down the number of 3d electrons in each of the following ions:

Ti²⁺, V²⁺, Cr³⁺, Mn²⁺, Fe²⁺, Fe³⁺, CO²⁺, Ni²⁺ and Cu²⁺.

Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral).

The $d$ electron configuration of $C r^{2 +}, M n^{2 +}, F e^{2 +}$ and $N i^{2 +}$ are $3 d^{4}, 3 d^{5}, 3 d^{6}$ and $3 d^{8}$ respectively. Which one of the following aqua complexes will exhibit the maximum paramagnetic behaviour?

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Which of the following does not represent the correct order of the properties indicated?

The correct option is A Ni2+>Cr2+>Fe2+>Mn2+ (size)As we move along a period, size decreases so Ni+2 has lowest radius among Ni2+<Cr2+<Fe2+<Mn2+ (size)Cu+2 1 2 3 4 5

The correct option is A $N i^{2 +} > C r^{2 +} > F e^{2 +} > M n^{2 +}$ (size)
As we move along a period, size decreases so $N i^{+ 2}$ has lowest radius among
$N i^{2 +} < C r^{2 +} < F e^{2 +} < M n^{2 +}$ (size)
$C u^{+ 2}$ 1 2 3 4 5