p-Block elementsHard

Question

Which of the following is/are true for oxygen.

Options

A.KMnO4(s) on strong heating gives oxygen gas
B.Oxygen mixed with helium is used for artificial respiration.
C.It has two unpaired electrons in bonding p molecular orbitals.
D.Brins process is used as industrial method for the preparation of oxygen gas.

Solution

(A) 2KMnO4 → K2MnO4 + MnO2 + O2
(B) He is insoluble in blood at higher pressure.
(C) O2 has two unpaired electrons in antibonding p molecular orbitals.
(D) 2BaO + O2 (air) 2BaO2  ; BaO2 2BaO + O2

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