Chemistry - f-block Question with Solution | TestHub

Question Explanation:

Find the correct statement. 

Concept: This question is based on properties of lanthanides.

Solution:

Lanthanides are reactive metals that react with acids to liberate hydrogen gas and react with water to form hydroxides and hydrogen gas. The common oxidation state of actinoids is +3 , and while they show MnO₂ is used in dry battery cells.

Lanthanoids react with acids and liberate H₂ gas.

Lanthanoids react with H₂O to form Ln(OH)₃ and H₂ gas.

In actinoid series, the common oxidation state is +3.

MnO₂ is used in dry cells a wider range, it is not just +4.

Final Answer: The correct option is (A)