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Testing for Ions and Gases (Co-ordinated Science 2019-2021)
By Alvin Ibalio
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Last updated over 7 years ago
30 questions
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Note from the author:
IGCSE Co-ordinated Science Chemistry
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Question 1
1.
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
Question 2
2.
A white ppt.
B cream ppt.
C ammonia produced
D effervescence, carbon dioxide produced
Question 3
3.
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
Question 4
4.
A effervescence, carbon dioxide produced
B cream ppt.
C white ppt.
D ammonia produced
Question 5
5.
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
Question 6
6.
A effervescence, carbon dioxide produced
B white ppt.
C cream ppt.
D ammonia produced
Question 7
7.
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
Question 8
8.
A ammonia produced
B white ppt.
C cream ppt.
D effervescence, carbon dioxide produced
Question 9
9.
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
Question 10
10.
A effervescence, carbon dioxide produced
B white ppt.
C cream ppt.
D ammonia produced
Question 11
11.
A light blue ppt., insoluble in excess
B green ppt., insoluble in excess
Question 12
12.
A ight blue ppt., insoluble in excess
B green ppt., insoluble in excess
Question 13
13.
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
Question 14
14.
A light blue ppt., insoluble in excess
B green ppt., insoluble in excess
Question 15
15.
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
Question 16
16.
A light blue ppt., insoluble in excess
B white ppt., insoluble in excess
Question 17
17.
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
Question 18
18.
A green ppt., insoluble in excess
B white ppt., soluble in excess, giving colourless solution
Question 19
19.
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.
Question 20
20.
A ammonia produced on warming
B white ppt., insoluble in excess
Question 21
21.
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
Question 22
22.
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
Question 23
23.
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
Question 24
24.
A bleaches damp litmus paper
B turns damp, red litmus paper blue
C turns limewater milky
D ‘pops’ with a lighted splint
Question 25
25.
A turns damp, red litmus paper blue
B turns limewater milky
C ‘pops’ with a lighted splint
D relights a glowing splint
Question 26
26.
A ‘pops’ with a lighted splint
B relights a glowing splint
C bleaches damp litmus paper
D turns limewater milky
Question 27
27.
A blue-green
B yellow
C red
D lilac
Question 28
28.
A blue-green
B yellow
C red
D lilac
Question 29
29.
A blue-green
B yellow
C red
D lilac
Question 30
30.
A blue-green
B yellow
C red
D lilac
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
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
E white ppt., soluble in excess, giving a colourless solution
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
E white ppt., soluble in excess, giving a colourless solution
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
E white ppt., soluble in excess, giving a 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
E green 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
E no ppt. or very slight white ppt.
E turns damp, red litmus paper blue
E turns damp, red litmus paper blue
E relights a glowing splint
E bleaches damp litmus paper
E turns damp, red litmus paper blue
