iCON Education - d and f Block Elements AIIMS Test

Question 1: Palette 1/8

AIIMS 2019 MCQ

Which element can have oxidation state from 4 to 6?

Question 2: Palette 2/8

AIIMS 2019 MCQ

Which give coloured carbonate precipitate?

$\mathrm{Hg}_2^{2+}$

$\mathrm{Sr}^{+2}$

$\mathrm{Bi}^{+3}$

$\mathrm{Li}^{+}$

Question 3: Palette 3/8

AIIMS 2019 MCQ

Assertion : Out of $\mathrm{CrO}_3$ and $\mathrm{Al}_2 \mathrm{O}_3, \mathrm{CrO}_3$ having lower melting point than $\mathrm{Al}_2 \mathrm{O}_3$.

Reason : Oxidation state of $\mathrm{Cr}$ in $\mathrm{CrO}_3$ is high.

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

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

If assertion is true, but reason is false.

If both assertion and reason are false.

Question 4: Palette 4/8

AIIMS 2019 MCQ

Assertion : $\mathrm{S}_2 \mathrm{O}_7^{2-}$ and $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ both exist.

Reason : Both have same valence electrons.

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

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

If assertion is true, but reason is false.

If both assertion and reason are false.

Question 5: Palette 5/8

AIIMS 2019 MCQ

Assertion : $\mathrm{Yb}^{2+}$ is more stable in compare to $\mathrm{Gd}^{+2}$.

Reason : The electronic configuration of GD is $[\mathrm{Xe}] 4 f^7 5 d^2 6 s^2$.

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

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

If assertion is true, but reason is false.

If both assertion and reason are false.

Question 6: Palette 6/8

AIIMS 2019 MCQ

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.

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

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

If assertion is true, but reason is false.

If both assertion and reason are false.

Question 7: Palette 7/8

AIIMS 2018 MCQ

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

$\mathrm{Mn}^{2+}>\mathrm{Ti}^{2+}>\mathrm{Cr}^{2+}$

$\mathrm{Ti}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Mn}^{2+}$

$\mathrm{Mn}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ti}^{2+}$

$\mathrm{Cr}^{2+}>\mathrm{Ti}^{2+}>\mathrm{Mn}^{2+}$

Question 8: Palette 8/8

AIIMS 2018 MCQ

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

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

Both (A) and (R) are true and (R) is the correct explanation of (A).

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

(A) is true and (R) is false.

Both (A) and (R) are false.