Preliminary Tests For Salt Analysis

Question 1

Colour of Fe2+ and Fe3+

Answer 1

Light green
Yellow
Brown

Question 2

Colour of cu2+

Answer 2

Blue

Question 3

Colour of Ni2+

Answer 3

Bright green

Question 4

Colour of Co2+

Answer 4

Blue
Red
Violet
Pink

Question 5

Colour of Mn2+

Answer 5

Light pink

Question 6

Colour of Cu2+ when hot and when cold

Answer 6

White
Blue

Question 7

Colour of fe2+ when hot and when cold

Answer 7

Dirty white or yellow
Green

Question 8

Colour of zn2+ when hot or when cold

Answer 8

Yellow
White

Question 9

Colour of Co2+ when hot or when cold

Answer 9

Blue
Pink

Question 10

Flame and flame through blue glass
Cu2+

Answer 10

Green flame with blue centre
Same

Question 11

Flame and flame through blue glass
Sr2+

Answer 11

Crimson red
Purple

Question 12

Flame and flame through blue glass
Ba2+

Answer 12

Apple green
Bluish green

Question 13

Flame and flame through blue glass
Ca2+

Answer 13

Brick red
Green

Question 14

Borax bead in oxidizing (non luminous) cu2+ cold and hot

Reducing(luminous)

Answer 14

Blue
Green

Red opaque
Colorless

Question 15

Borax bead in oxidizing (non luminous) flame ni2+ hot and cold

Reducing (luminous) flame

Answer 15

Reddish brown
Violet

Grey
Grey

Question 16

Borax bead in oxidizing (non luminous) flame Mn2+ hot and cold

Reducing(luminous) flame

Answer 16

Light violet
Light violet

Colorless
Colorless

Question 17

Borax bead in oxidizing(non luminous) flame fe3+ hot and cold

In reducing(luminous) flame

Answer 17

Yellow
Yellowish brown

Green
Green

Question 18

Charcoal test for pb2+

Answer 18

Yellow-hot
Grey cold

Question 19

Charcoal test for As3+

Answer 19

White + garlic odour

Question 20

Charcoal test for cd2+

Answer 20

Brown residue

Question 21

Charcoal test for zn2+

Answer 21

Yellow-hot
White-cold

Question 22

CoO + ZnO

Answer 22

Green

Question 23

CoO + MgO

Answer 23

Pink

Question 24

CoO + Al2O3

Answer 24

Blue