Qualitative Analysis 1

Question 1

Hydrated salt of Mn

Answer 1

Light pink

Question 2

Hydrated salt of Co (II)

Answer 2

Reddish pink

Question 3

HgO, HgI2 , Pb3O4

Answer 3

Red

Question 4

Sb2S3 , some dichromates and ferricyanides

Answer 4

Orange red

Question 4

Fe2O3

Answer 4

Reddish brown

Question 4

PbO2 , Bi2S3 , CdO, Ag2O, CuCrO4, SnS

Answer 4

Dark brown

Question 5

MnO2

Answer 5

Black

Question 6

Chromates, As2S3 ,As2S5 , AgBr, AgI, PbI2,Cds, SnS2 , a few iodides and ferrocyanides

Answer 6

Light Yellow

Question 7

K2MnO4 , Ni salts, hydrated ferrous salts some Cu(II) compounds

Answer 7

Green

Question 8

Salt of Cr (III)

Answer 8

Dark green

Question 9

Hydrated CuSO4 , Anhydrous CoSO 4

Answer 9

Blue

Question 10

Sulphides of Ag(I), Cu(I), Cu(II), Fe(II), Ni(II), Co(II), Hg(II) and Pb(II), MnO2 ,Fe3O4 , FeO, CuO, Co3O4 , Ni2O3

Answer 10

Black

Question 10

Ferric salts

Answer 10

Light yellow or brown

Question 10

Ferric salts

Answer 10

Light yellow or brown

Question 11

Ni2+, Fe2+, Cr3+ and Cu2+

Answer 11

Green or blue

Question 12

Co2+ and Mn2+

Answer 12

Pink

Question 13

CrO, Fe3+, [Fe(CN)6]4-

Answer 13

Yellow

Question 14

Dichromates

Answer 14

orange

Question 15

permanganates

Answer 15

Purple

Question 16

HgCl2 , NH4X, AlCl3 , HgCl2,As2O3 , Sb2O3

Answer 16

White

Question 17

As2S3 and HgI2

Answer 17

turns red when rubbed with glass rod

Question 18

Iodides

Answer 18

Blue black and violet vapours

Question 19

Yellow (hot) and White (cold)

Answer 19

ZnO

Question 20

Reddish Brown (hot); Yellow (cold)

Answer 20

PbO

Question 21

Black (hot); Red (cold)

Answer 21

HgO, Pb3O4

Question 22

Black (hot); Red Brown (cold)

Answer 22

Fe2O3

Question 23

Charcoal cavity test with Cobalt Nitrate Blue (Thenard’s blue) Green (Rinmann’s green) Pink

Answer 23

Blue (Thenard’s blue): Al3+ Green (Rinmann’s green): Zn3+ Pink: Mg2+