It is recommended that liquor ammonia botthe should be opened after cooling it in ice for sometime. This is because liquor ammonia:(I) The principal reducing product is NO gas(II) Cu metal is oxidised to Cu2+ (aq.) ion which is blue in colour.(III) NO is paramagnetic and has one unpaired electron in antibonding molecular orbital(IV) No reacts with O2 to produce NO2 which is linear in shapeChoose the correct statements: