POTASSIUM PEROXIDE,POTASSIUM SUPEROXIDE

POTASSIUM HYDROXIDE,POTASSIUM OXIDE

POTASSIUM CHLORIDE,POTASSIUM SULPHATE

Match the compound(s)/metal(s) in X with their uses in Y {:(X,Y),(A."Liquid sodium metal",I."Breathing apparatus submarine"),(B."Potassium stearate",II."Explosive"),(C."Potassium nitrate",III."Coolant in nuclear reactor"),(D."Potassium superoxide hence correct order is",IV."Soft soap"):}

Potassium Dichromate

K_(4)[Fe(CN)_(6)] is _________. (i) potassium hexacyanoferrous (II) (ii)potassium hexacyanoferate (II) (iii) potassium ferrocyanide (iv)hexacyanoferrate (III) potassium CORRECT answer is ________.

Potassium Permanganate

Explain the following: (a) KO_2 is paramagnetic. (b) Lithium forms oxide, sodium forms peroxide while potassium and rubidium form superoxides. (c) BaO is soluble but BaSO_4 is insoluble in water.

Assertion: Superoxide ion is paramagnetic whereas peroxide ion is diamagnetic. Reason: Superoxide ion [O=O]^(-) has one unpaired electron whereas peroxide ion [O=O]^(-) has no unpaired electron.