Question

Statement 1:The $4f$ - and $5f$ - inner transition series of elements are placed separately at the bottom of the Modem periodic table
Statement 2: (i) Position of $f$ -block elements prevents the undue expansion of the Modem periodic table, i.e., maintains its structure
(ii) Position of $f$-block elements preserves the principle of classification by keeping elements with similar properties in a single column

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the Statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (A)

Correct answer is (a) If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$