Tests And Results

Question 1

Test for carbon dioxide?

Answer 1

Bubble through limewater, it turns cloudy

Question 2

Test for hydrogen?

Answer 2

Insert lit splint into test tube containing hydrogen, squeaky pop

Question 3

Test for oxygen?

Answer 3

Glowing splint will re-light in its presence

Question 4

Test for ammonia?

Answer 4

Turns moist red litmus paper blue

Question 5

Test for water?

Answer 5

Add anhydrous copper sulfate, turns white to blue

Question 6

Flame Test for calcium?

Answer 6

Brick red flame

Question 7

Flame Test for lithium?

Answer 7

Red flame

Question 8

Flame Test for sodium?

Answer 8

Yellow/orange flame

Question 9

Flame Test for potassium?

Answer 9

Lilac flame

Question 10

Test for chloride?

Answer 10

Add silver nitrate and nitric acid, a white precipitate is formed

Question 11

Test for iodide?

Answer 11

Add silver nitrate and nitric acid, yellow precipitate is formed

Question 12

Test for bromide?

Answer 12

Add silver nitrate and nitric acid, cream precipitate is formed

Question 13

Test for iron(III) ions?

Answer 13

Add sodium hydroxide, Orange/brown precipitate is formed

Question 14

Test for ammonium ions?

Answer 14

Add sodium hydroxide, gas given off turns damp red litmus blue

Question 15

Test for sulfate ions?

Answer 15

Add HCl and barium chloride, white precipitate is formed

Question 16

Test for copper ions?

Answer 16

Add sodium hydroxide and heat, blue precipitate is formed

Question 17

Test for iron(II) ions?

Answer 17

Add sodium hydroxide heat, green precipitate

Question 18

Test for chlorine?

Answer 18

It de colourises/bleaches litmus paper

Question 19

Test for c=c double bond?

Answer 19

Decolourises bromine water

Question 20

Test for carbonate ions?

Answer 20

Add HCl, observe effervescence