QA

Question 1

carbonate test

Answer 1

add dilute acid; effervescence and carbon dioxide produced

Question 2

chloride in solution test

Answer 2

acidify with dilute nitric acid, then add aqueous silver nitrate; white ppt observed

Question 3

sulfate in solution test

Answer 3

add aqueous sodium hydroxide, then aluminium foil; warm carefully; ammonia produced

Question 4

ammonium

Answer 4

effect of aq. sodium hydroxide: ammonia produced on warming

Question 5

calcium

Answer 5

effect of aq. sodium hydroxide: white ppt. insoluble in excess

effect of aq. ammonia: no ppt.

Question 6

copper (II)

Answer 6

effect of aq. sodium hydroxide: light blue ppt, insoluble in excess

effect of aq. ammonia: light blue ppt, soluble in excess giving a dark blue solution

Question 7

iron (II)

Answer 7

effect of aq. sodium hydroxide: green ppt. insoluble in excess

effect of aq. ammonia: green ppt. insoluble in excess

Question 8

iron (III)

Answer 8

effect of aq. sodium hydroxide: red-brown ppt, insoluble in excess

effect of aq. ammonia: red brown ppt, insoluble in excess

Question 9

zinc

Answer 9

effect of aq. sodium hydroxide: white ppt., soluble in excess giving a colourless solution

effect of aq. ammonia: white ppt., soluble in excess giving a colourless solution

Question 9

lead (II)

Answer 9

effect of aq. sodium hydroxide: white ppt., soluble in excess giving colourless solution

effect of aq. ammonia: white ppt., insoluble in excess

Question 10

ammonia gas

Answer 10

turns damp red litmus paper blue

Question 11

carbon dioxide

Answer 11

gives white ppt. with limewater (ppt. dissolves in excess carbon dioxide)

Question 12

chlorine

Answer 12

bleaches damp litmus paper

Question 13

hydrogen

Answer 13

“pops” with lighted splint

Question 14

oxygen

Answer 14

relights a glowing splint

Question 15

sulfur dioxide

Answer 15

turns aqueous potassium manganate (VII) from purple to colourless