Colours

Question 1

Fluorine

Answer 1

Yellow gas.

Question 2

Chlorine.

Answer 2

Green gas.

Question 3

Bromine.

Answer 3

Red-brown liquid.

Question 4

Iodine solid.

Answer 4

Grey-black.

Question 5

Iodine vapour.

Answer 5

Violet.

Question 6

Chlorine water.

Answer 6

Green/colourless.

Question 7

Bromine water.

Answer 7

Yellow/orange/brown.

Question 8

Iodine solution.

Answer 8

Yellow/brown: polar solvents.

Violet/purple: non-polar solvents.

Question 9

What is the observation of the reaction with fluoride with concentration sulfuric acid?

Answer 9

Steamy/misty fumes (of HF)

Question 10

What is the observation of the reaction with chloride with concentration sulfuric acid?

Answer 10

Steamy/misty fumes (HCl)

Question 11

What is the observations of the reaction with bromide with concentration sulfuric acid?

Answer 11

Steamy/misty fumes (of HBr)

Red-brown vapour (Br2)

Question 12

What is the observations of the reaction with iodide with concentration sulfuric acid?

Answer 12

Steamy/misty fumes (of HI)
Violet/purple vapour (I2)
Smell of rotten eggs (H2S)
Yellow solid (S)
Grey black solid (on the sides of the test tube)(I2)

Question 13

What is the observation of the reaction of solid halide with concentrated phosphoric acid?

Answer 13

Steamy/misty fumes.