A s-block element (M) reacts with oxygen to form an oxide of the formula . The oxide is pale yellow in colour and paramagnetic. The element (M) is: 2 (A) Mg (B) Na (C) Ca (D) K

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Question

A s-block element (M) reacts with oxygen to form an oxide of the formula . The oxide is pale yellow in colour and paramagnetic. The element (M) is: 2

(A) Mg
(B) Na
(C) Ca
(D) K

Prashant Kotian · Accepted Answer

Correct answer: D) K. Potassium reacts with oxygen to form yellow coloured potassium superoxide KO , which is paramagnetic in nature.

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