COMEDK 2024 Morning Shift | d and f Block Elements Question 19 | Chemistry

No.	Column I	No.	Column II
A	$$ \mathrm{La}(\mathrm{OH})_3 $$	P	Acidic in nature
B	$$ \mathrm{Mn}_2 \mathrm{O}_7 $$	Q	Least basic
C	$$ \mathrm{Lu}(\mathrm{OH}) 3 $$	R	Interstitial compound
D	$$ \mathrm{Fe}_3 \mathrm{H} $$	S	Most basic

$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{P} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{R} $$

$$ \mathrm{A}=\mathrm{S} \quad \mathrm{B}=\mathrm{R} \quad \mathrm{C}=\mathrm{Q} \quad \mathrm{D}=\mathrm{P} $$

$$ \begin{array}{llll} \mathrm{A}=\mathrm{Q} & \mathrm{B}=\mathrm{P} & \mathrm{C}=\mathrm{S} & \mathrm{D}=\mathrm{R} \end{array} $$

$$ \begin{array}{llll} \mathrm{A}=\mathrm{R} & \mathrm{B}=\mathrm{P} & \mathrm{C}=\mathrm{S} & \mathrm{D}=\mathrm{Q} \end{array} $$

COMEDK 2024 Morning Shift

MCQ (Single Correct Answer)

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Choose the incorrect statement from the following

The ability of Fluorine to stabilise the higher oxidation states of transition metals exceeds that of Oxygen

$$\mathrm{Cu}$$ (I) compounds in aqueous medium undergo disproportionation reaction

$$\mathrm{Cr}^{2+}$$ is a stronger reducing agent than $$\mathrm{Fe}^{2+}$$

$$\mathrm{MoO}_3$$ and $$\mathrm{WO}_3$$ are not as strong oxidants as $$\mathrm{CrO}_3$$

COMEDK 2023 Morning Shift

MCQ (Single Correct Answer)

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$$\mathrm{Ti}^{2+}$$ is purple while $$\mathrm{Ti}^{4+}$$ is colourless because

$$\mathrm{Ti}^{2+}$$ has $$3 d^2$$ configuration

$$\mathrm{Ti}^{4+}$$ has $$3 d^2$$ configuration

$$\mathrm{Ti}^{2+}$$ is very small cation when compared to $$\mathrm{Ti}^{2+}$$ and hence, doesn't absorb any radiation

There is no crystal field effect in $$\mathrm{Ti}^{4+}$$

COMEDK 2023 Morning Shift

MCQ (Single Correct Answer)

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A volatile compound is formed by carbon monoxide and

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