d & f-block Elements

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Q1. What is the common oxidation state of transition metals in the d-block? (2023)

Solution:

The common oxidation state of transition metals in the d-block is +2, as they often lose two electrons from their outermost shell.

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Q2. Which of the following elements belongs to the lanthanide series? (2023)

Solution:

Neodymium (Nd) is a lanthanide element, while the others belong to different series.

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Q3. What is the primary reason for the variable oxidation states of transition metals?

Solution:

The presence of d-electrons allows transition metals to exhibit variable oxidation states.

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Q4. Which of the following d-block elements is used in making alloys?

Solution:

Nickel (Ni) is commonly used in making various alloys due to its strength and corrosion resistance.

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Q5. Which transition metal is known for its catalytic properties in the Haber process?

Solution:

Iron is used as a catalyst in the Haber process for ammonia synthesis.

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Q6. Which transition metal has the highest melting point?

Solution:

Tungsten (W) has the highest melting point among transition metals.

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Q7. Which of the following is a common use of transition metals?

Solution:

Transition metals are commonly used as catalysts in various chemical reactions.

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Q8. Which transition metal is known for forming complex ions with a coordination number of 6?

Solution:

Cobalt commonly forms complex ions with a coordination number of 6, such as in [Co(NH3)6]3+.

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Q9. Which of the following elements is a f-block element?

Solution:

Uranium is an f-block element as it is part of the actinides series.

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Q10. Which of the following elements is known for forming complex ions?

Solution:

Copper (Cu) is known for forming complex ions due to its ability to coordinate with ligands.