d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge - Page 206

Question 1026

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What is the relationship between the highest oxidation number in transition metal oxides and the group number of the element?

The highest oxidation number is always one less than the group number
The highest oxidation number coincides with the group number
The highest oxidation number is always two more than the group number
There is no consistent relationship

Question 1027

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How does the acidic character of transition metal oxides change as the oxidation number of the metal increases?

Acidic character decreases
Acidic character becomes predominant
Acidic character remains unchanged
Acidic character becomes neutral

Question 1028

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What is the primary product formed when the basic oxide CrO reacts with an acid?

A salt containing Cr3+ ions
A salt containing Cr2+ ions
Chromate ions (CrO4 2-)
Dichromate ions (Cr2O7 2-)

Question 1029

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Which of the following best describes the behavior of Cr2O3 when reacting with both acids and bases?

It is purely basic
It is purely acidic
It is amphoteric
It is neutral and unreactive

Question 1030

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What is the general trend in the melting points of higher transition metal oxides like CrO3 and V2O5?

They tend to have very high melting points
They tend to have low melting points
Melting points remain constant regardless of oxidation state
They tend to sublime directly from solid to gas