801 Li is different from its family members due to____________________? Chemistry Medium Full question → A small size B high charge density C less electropositivity D all of the above
802 The oxides of beryllium BeO is_______________? Chemistry Medium Full question → A Acidic B Basic C Amphoteric D Neutral
803 Formula of Chile saltpetre is__________________? Chemistry Medium Full question → A NaNO3 B CaCO3 C Ba (NO3)2 D NH4Cl
804 A elements are named as alkali metals because_______________? Chemistry Medium Full question → A Their oxides are basic B Their oxide and hydroxides are water soluble C Both A & B D They are found in earth
805 In base catalyzed reaction of carbonyl compound the catalyst___________________? Chemistry Medium Full question → A increases the nucleophilic character of reagent B increases electrophilic character of carbonyl compound C acidic character of reagent D both a and b
806 Which of the following is a symmetrical ketone___________________? Chemistry Medium Full question → A 3 – hexanone B acetone C butanone D 2-pentanone
807 Which one exhibits aldol condensation____________________? Chemistry Medium Full question → A HCHO B C6H5CHO C Cl3CCHO D CH3COCH3
808 Acetaldehyele cyanohydrin on acid hydrolysis yields___________________? Chemistry Medium Full question → A Tartaric acid B Propanoic acid C Lactic acid D Valeric acid
809 Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter? Chemistry Medium Full question → A PdCl2 B Cu2Cl2 C CuCl2 D PbCl2
810 Aldehyde and ketone have same general formula for homologous series_________________? Chemistry Medium Full question → A CnH2nO2n B CnH2n C CnH2nO D CnH2nOn+1
811 On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________? Chemistry Medium Full question → A pink B black C yellow D brick red
812 Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________? Chemistry Medium Full question → A 60% B 50% C 52% D 8%
813 Formula of haloform is_________________? Chemistry Medium Full question → A HCOX B CX4 C CHX3 D CH3X
814 Formaldehyde and lactose are combined to produce throat lozenges named as__________________? Chemistry Medium Full question → A formamint B lactomint C aldomint D formalactose
815 Which of the following do not give aldol condensation reactions ? Chemistry Medium Full question → A formaldehyde B acetaldehyde C diemthyl ketone D propionaldehyde
816 Which of the following reagents will react with both aldehydes and ketones ? Chemistry Medium Full question → A Grignard reagent B Tollens reagent C Fehlings reagent D Benedicts reagent
817 Which of the following reactions may be assoclated with aldehyde and ketone ? Chemistry Medium Full question → A nucleophile addition B polymerization C oxidation D all of the above
818 Acetone reacts with HCN to form a cyanohydrin. It is an example of________________? Chemistry Medium Full question → A electronphilic addition B electrophilic substitution C nucleophilic addition D nucleophilic substitution
819 Formalin is ___________ solution of formaldehyde in water? Chemistry Medium Full question → A 10% B 20% C 40% D 60%
820 The carbon atom of carbonyl group is__________________? Chemistry Medium Full question → A sp hybridized B sp2 hybridized C cp3 hybridized D dsp2 hybridized