ElectrochemistryRules and Exceptions of Oxidation Number1026Choose the best answerWhat is the oxidation state of oxygen in KO₂?A−1/2B−2C−1D−3 Like 0 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Equilibrium Constant1027Choose the best answerA reversible reaction is at dynamic equilibrium when:AReactants and products have equal concentrationsBForward and reverse reaction rates become equalCBoth reactions stop completelyDReactants are completely converted into products Like 0 Discuss 0Share
Periodic TableAtomic Radius Trend1028Choose the best answerWhich comparison between Al and Ga is correct according to the usual periodic-trend explanation?AGa is considerably larger than Al.BAl and Ga have exactly equal radii.CGa is slightly smaller than Al.DGa is smaller because it has fewer occupied shells. Like 0 Discuss 0Share
Chemistry of HydrocarbonsFriedel–Crafts Acylation1029Choose the best answerFriedel–Crafts acylation introduces a:AAlkyl groupBAcyl groupCNitro groupDSulphonic acid group Like 0 Discuss 0Share
Alcohols and PhenolsPreparation of Alcohols by Reduction of Ketones1030Choose the best answerReduction of a ketone with NaBH₄ produces:APrimary alcoholBSecondary alcoholCTertiary alcoholDAlkane Like 0 Discuss 0Share