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Testing for Ions and Gases (Co-ordinated Science 2019-2021)

Last updated about 7 years ago

30 questions

Note from the author:

IGCSE Co-ordinated Science Chemistry

1 point

1

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 

1 point

1

Question 2

2.

A  white ppt. 

B  cream ppt. 

C  ammonia produced 

D  effervescence, carbon dioxide produced 

1 point

1

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 

1 point

1

Question 4

4.

A  effervescence, carbon dioxide produced 

B  cream ppt. 

C  white ppt. 

D  ammonia produced 

1 point

1

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 

1 point

1

Question 6

6.

A  effervescence, carbon dioxide produced 

B  white ppt.

C   cream ppt.

D   ammonia produced

1 point

1

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 

1 point

1

Question 8

8.

A   ammonia produced

B  white ppt. 

C   cream ppt.

D  effervescence, carbon dioxide produced 

1 point

1

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 

1 point

1

Question 10

10.

A  effervescence, carbon dioxide produced 

B  white ppt.

C  cream ppt.

D  ammonia produced 

1 point

1

Question 11

11.

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 

1 point

1

Question 12

12.

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 

1 point

1

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 

E  white ppt., soluble in excess, giving a colourless solution 

1 point

1

Question 14

14.

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 

1 point

1

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 

E white ppt., soluble in excess, giving a colourless solution 

1 point

1

Question 16

16.

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 

1 point

1

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 

E white ppt., soluble in excess, giving a colourless solution 

1 point

1

Question 18

18.

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 

1 point

1

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. 

E green ppt., insoluble in excess 

1 point

1

Question 20

20.

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 

1 point

1

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 

E no ppt. or very slight white ppt. 

1 point

1

Question 22

22.

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 

1 point

1

Question 23

23.

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 

1 point

1

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 

E relights a glowing splint 

1 point

1

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 

E bleaches damp litmus paper 

1 point

1

Question 26

26.

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 

1 point

1

Question 27

27.

A blue-green

B yellow

C red

D lilac

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1

Question 28

28.

A blue-green 

B yellow

C red

D lilac

1 point

1

Question 29

29.

A blue-green

B yellow

C red

D lilac

1 point

1

Question 30

30.

A blue-green

B yellow

C red

D lilac