Group 2 Effect In Solution

Question 1

Magnesium in sulphate solution

Answer 1

No precipitation

Magnesium sulphate is insoluble

Question 2

Calcium in sulphate solution

Answer 2

White precipitation

Question 3

Strontium in sulphate solution

Answer 3

White precipitaiton

Question 4

Barium in sulphate solution

Answer 4

White precipitation

Question 5

Magnesium in hydroxide solution

Answer 5

Faint white precipitaiotn

Question 6

Calcium in hydroxide solution

Answer 6

Faint white precipitation

Question 7

Strontium in hydroxide solution

Answer 7

Faint white precipitate

Question 8

Barium in hydroxide

Answer 8

No precipitation , barium is soluble

Question 9

Lithium and group 2 carbonate in heating

Answer 9

CO2 produced

Question 10

Sodium and potassium carbonate in heating

Answer 10

No effect (except water of crystallisation may given)

Question 11

Sodium and potassium nitrate

Answer 11

Oxygen only gas evolved

Question 12

Lithium and all group 2 carbonate in heating

Answer 12

Nitrogen dioxide and oxygen evolved

Question 13

Identify alkene

Answer 13

Bromine water

Brown to colourless

Question 14

Halogealkanes

Answer 14

Heat with sodium hydroxide solution with dilute nitric acid test with silver nitrate solution as with inorganic halides

Question 15

Alcohol or carboxylic acids

Answer 15

Add PCl5 misty fumes of HCl are produced when turns blue litmus paper red

Question 16

Primary alcohol distinguish

Answer 16

Add PCl5 , warm it with aqueous pottasium divhromate (K2Cr2O7) and dilute H2SO4

—> misty fumes are given off
—> orange to green

Question 17

Secondary alcohol

Answer 17

Add PCl5 with aqueous potassium dichromate (K2C42O7) and dilute H2SO4

-misty fumes
Orange to green

Question 18

Tertiary alcohol

Answer 18

Misty fumes

No colour change