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1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Assertion : $$d^5$$ configuration is more stable than $$d^4$$.

Reason : $$d^5$$ has more exchange energy as compared to $$d^4$$ because 10 and 6 exchanges are possible in $$d^5$$ and $$d^4$$ respectively.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both 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 both assertion and reason are false.
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

The correct order of spin only magnetic moment (in BM) for $$\mathrm{Mn}^{2+}, \mathrm{Cr}^{2+}$$ and $$\mathrm{Ti}^{2+}$$ ions is

A
$$\mathrm{Mn}^{2+}>\mathrm{Ti}^{2+}>\mathrm{Cr}^{2+}$$
B
$$\mathrm{Ti}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Mn}^{2+}$$
C
$$\mathrm{Mn}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ti}^{2+}$$
D
$$\mathrm{Cr}^{2+}>\mathrm{Ti}^{2+}>\mathrm{Mn}^{2+}$$
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion (A) Separation of Zr and Hf is difficult.

Reason (R) Zr and Hf lie in the same group of the periodic table.

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true and (R) is false.
D
Both (A) and (R) are false.
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