Testing for Ions and Gases (Co-ordinated Science 2019-2021)
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by Alvin Ibalio
| 30 Questions
Note from the author:
IGCSE Co-ordinated Science Chemistry
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1
1 pt
A acidify with dilute nitric acid, then add aqueous silver nitrate
B add aqueous sodium hydroxide, then aluminium foil; warm carefully
C add dilute acid
D acidify, then add aqueous barium nitrate
2
1 pt
A white ppt.
B cream ppt.
C ammonia produced
D effervescence, carbon dioxide produced
3
1 pt
A add dilute acid
B acidify with dilute nitric acid, then add aqueous silver nitrate
C add aqueous sodium hydroxide, then aluminium foil; warm carefully
D acidify, then add aqueous barium nitrate
4
1 pt
A effervescence, carbon dioxide produced
B cream ppt.
C white ppt.
D ammonia produced
5
1 pt
A acidify with dilute nitric acid, then add aqueous silver nitrate
B add aqueous sodium hydroxide, then aluminium foil; warm carefully
C
acidify, then add aqueous barium nitrate
D add dilute acid
6
1 pt
A effervescence, carbon dioxide produced
B white ppt.
C cream ppt.
D ammonia produced
7
1 pt
A add dilute acid
B acidify with dilute nitric acid, then add aqueous silver nitrate
C add aqueous sodium hydroxide, then aluminium foil; warm carefully
D acidify, then add aqueous barium nitrate
8
1 pt
A ammonia produced
B white ppt.
C cream ppt.
D effervescence, carbon dioxide produced
9
1 pt
A add dilute acid
B acidify with dilute nitric acid, then add aqueous silver nitrate
C add aqueous sodium hydroxide, then aluminium foil; warm carefully
D acidify, then add aqueous barium nitrate
10
1 pt
A effervescence, carbon dioxide produced
B white ppt.
C cream ppt.
D ammonia produced
11
1 pt
A light blue ppt., insoluble in excess
B green ppt., insoluble in excess
C red-brown ppt., insoluble in excess
D ammonia produced on warming
E white ppt., insoluble in excess
F white ppt., soluble in excess, giving colourless solution
12
1 pt
A ight blue ppt., insoluble in excess
B green ppt., insoluble in excess
C red-brown ppt., insoluble in excess
D ammonia produced on warming
E white ppt., insoluble in excess
F white ppt., soluble in excess, giving colourless solution
13
1 pt
A no ppt. or very slight white ppt.
B light blue ppt., soluble in excess, giving a dark blue solution
C green ppt., insoluble in excess
D red-brown ppt., insoluble in excess
E white ppt., soluble in excess, giving a colourless solution
14
1 pt
A light blue ppt., insoluble in excess
B green ppt., insoluble in excess
C red-brown ppt., insoluble in excess
D white ppt., insoluble in excess
E ammonia produced on warming
F white ppt., soluble in excess, giving colourless solution
15
1 pt
A no ppt. or very slight white ppt.
B green ppt., insoluble in excess
C light blue ppt., soluble in excess, giving a dark blue solution
D red-brown ppt., insoluble in excess
E white ppt., soluble in excess, giving a colourless solution
16
1 pt
A light blue ppt., insoluble in excess
B white ppt., insoluble in excess
C ammonia produced on warming
D white ppt., soluble in excess, giving colourless solution
E green ppt., insoluble in excess
F red-brown ppt., insoluble in excess
17
1 pt
A light blue ppt., soluble in excess, giving a dark blue solution
B no ppt. or very slight white ppt.
C red-brown ppt., insoluble in excess
D green ppt., insoluble in excess
E white ppt., soluble in excess, giving a colourless solution
18
1 pt
A green ppt., insoluble in excess
B white ppt., soluble in excess, giving colourless solution
C light blue ppt., insoluble in excess
D white ppt., insoluble in excess
E ammonia produced on warming
F red-brown ppt., insoluble in excess
19
1 pt
A white ppt., soluble in excess, giving a colourless solution
B light blue ppt., soluble in excess, giving a dark blue solution
C red-brown ppt., insoluble in excess
D no ppt. or very slight white ppt.
E green ppt., insoluble in excess
20
1 pt
A ammonia produced on warming
B white ppt., insoluble in excess
C red-brown ppt., insoluble in excess
D white ppt., soluble in excess, giving colourless solution
E green ppt., insoluble in excess
F light blue ppt., insoluble in excess
21
1 pt
A white ppt., soluble in excess, giving a colourless solution
B red-brown ppt., insoluble in excess
C light blue ppt., soluble in excess, giving a dark blue solution
D green ppt., insoluble in excess
E no ppt. or very slight white ppt.
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22
1 pt
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
E turns damp, red litmus paper blue
23
1 pt
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
E turns damp, red litmus paper blue
24
1 pt
A bleaches damp litmus paper
B turns damp, red litmus paper blue
C turns limewater milky
D ‘pops’ with a lighted splint
E relights a glowing splint
25
1 pt
A turns damp, red litmus paper blue
B turns limewater milky
C ‘pops’ with a lighted splint
D relights a glowing splint
E bleaches damp litmus paper
26
1 pt
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
E turns damp, red litmus paper blue
27
1 pt
A blue-green
B yellow
C red
D lilac
28
1 pt
A blue-green
B yellow
C red
D lilac
29
1 pt
A blue-green
B yellow
C red
D lilac
30
1 pt
A blue-green
B yellow
C red
D lilac
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