Consider the following statements: I. s-block elements are found pure in nature. II. d-block elements form coloured ions, exhibit, variable valence and paramagnetism. III. Lanthanoids contains the elements from Ce(Z=58) to Lu(Z=71) IV. Actinoids contains the elements from Th(Z=90) to Lr(Z=103). Choose the option with all the correct statements :

Question

Consider the following statements: I. s-block elements are found pure in nature. II. d-block elements form coloured ions, exhibit, variable valence and paramagnetism. III. Lanthanoids contains the elements from Ce(Z=58) to Lu(Z=71) IV. Actinoids contains the elements from Th(Z=90) to Lr(Z=103). Choose the option with all the correct statements : (A) I and II (B) III and IV (C) II and III (D) II, III and IV

Tardigrade Admin · Accepted Answer

Statements II, III and IV are correct, while the statement I is incorrect. It's correct form is as follows: s-block elements are never found in pure nature because of their high reactivity.

I and II

III and IV

II and III

II, III and IV

Statements II, III and IV are correct, while the statement I is incorrect. It's correct form is as follows : s-block elements are never found in pure nature because of their high reactivity.

Statements II, III and IV are correct, while the statement I is incorrect.
It's correct form is as follows :
$s$ -block elements are never found in pure nature because of their high reactivity.