Statement I is correct because the 4f and 5f series (lanthanides and actinides) are placed separately to maintain the structure of the Periodic Table. However, Statement II is incorrect, as s-block elements are highly reactive and are generally found in combined states in nature.
What is the total no. of rare earth metals:
Which one of the following elements is found in the free state in nature?
Let \( y = f(x) \) be the solution of the differential equation
\[ \frac{dy}{dx} + 3y \tan^2 x + 3y = \sec^2 x \]
such that \( f(0) = \frac{e^3}{3} + 1 \), then \( f\left( \frac{\pi}{4} \right) \) is equal to:
Find the IUPAC name of the compound.
If \( \lim_{x \to 0} \left( \frac{\tan x}{x} \right)^{\frac{1}{x^2}} = p \), then \( 96 \ln p \) is: 32