Inorganic Chemistry - d & f Block Elements

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Q1. What is the primary use of titanium dioxide (TiO2)? (2023)

Solution:

Titanium dioxide (TiO2) is primarily used as a white pigment in paints and coatings.

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Q2. What is the primary oxidation state of vanadium in V2O5? (2023)

Solution:

In V2O5, vanadium has an oxidation state of +5.

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Q3. Which of the following compounds is a common oxidation state of vanadium? (2022)

Solution:

All the listed compounds represent common oxidation states of vanadium: +5 in V2O5, +2 in VO, and +3 in V2O3.

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Q4. Which of the following is a common oxidation state of gold? (2023)

Solution:

Gold commonly exhibits oxidation states of +1 and +3, with +3 being the most stable.

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Q5. Which of the following f-block elements is used in making strong permanent magnets? (2022)

Solution:

Neodymium is used in making strong permanent magnets, known as neodymium magnets.

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Q6. Which of the following compounds is a typical example of a transition metal complex? (2022)

Solution:

Fe(CN)6^4- is a typical example of a transition metal complex.

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Q7. What is the primary oxidation state of iron in FeCl3? (2023)

Solution:

In FeCl3, iron (Fe) has a primary oxidation state of +3.

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Q8. Which of the following ions has the highest magnetic moment? (2023)

Solution:

Fe²⁺ has the highest magnetic moment due to its higher number of unpaired electrons compared to Co²⁺, Ni²⁺, and Cu²⁺.

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Q9. What is the common oxidation state of iron in FeCl3? (2023)

Solution:

In FeCl3, iron (Fe) has an oxidation state of +3.

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Q10. Which of the following is a property of actinides? (2020)

Solution:

All actinides are radioactive, with many being synthetic and unstable.