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- 1. Multiple Choice
To a sample of A dilute sodium hydroxide solution was added dropwise then in excess. What two observations were made in order for Scientists to conclude that Fe2+ ions were present?
observation when sodium hydroxide was added dropwise - A green ppt was formed Observation when sodium hydroxide was added in excess - The green precipitate dissolved to give a dark green solution
observation when sodium hydroxide was added dropwise - A green ppt was formed Observation when sodium hydroxide was added in excess - The green precipitate remained
observation when sodium hydroxide was added dropwise - A blue ppt was formed Observation when sodium hydroxide was added in excess - The blue precipitate dissolved to give a dark blue solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate dissolved to give a colourless solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate remained
- 2. Multiple Choice
To a sample of A dilute sodium hydroxide solution was added dropwise then in excess. What two observations were made in order for Scientists to conclude that Fe3+ions were present?
observation when sodium hydroxide was added dropwise - A red-brown ppt was formed Observation when sodium hydroxide was added in excess - The green precipitate dissolved to give a red-brown solution
observation when sodium hydroxide was added dropwise - A red-brown ppt was formed Observation when sodium hydroxide was added in excess - The red-brown precipitate remained
observation when sodium hydroxide was added dropwise - A blue ppt was formed Observation when sodium hydroxide was added in excess - The blue precipitate dissolved to give a dark blue solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate dissolved to give a colourless solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate remained
- 3. Multiple Choice
To a sample of A dilute sodium hydroxide solution was added dropwise then in excess. What two observations were made in order for Scientists to conclude that Cu2+ions were present?
observation when sodium hydroxide was added dropwise - A red-brown ppt was formed Observation when sodium hydroxide was added in excess - The green precipitate dissolved to give a red-brown solution
observation when sodium hydroxide was added dropwise - A blue ppt was formed Observation when sodium hydroxide was added in excess - The blue precipitate remained
observation when sodium hydroxide was added dropwise - A blue ppt was formed Observation when sodium hydroxide was added in excess - The blue precipitate dissolved to give a dark blue solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate dissolved to give a colourless solution
observation when sodium hydroxide was added dropwise - A White ppt was formed Observation when sodium hydroxide was added in excess - The white precipitate remained
- 4. Multiple Choice
To a sample of A dilute sodium aqueous ammonia solution was added dropwise then in excess. What two observations were made in order for Scientists to conclude that Cu2+ions were present?
observation when aqueous ammonia was added dropwise - A red-brown ppt was formed Observation when aqueous ammonia was added in excess - The green precipitate dissolved to give a red-brown solution
observation when aqueous ammonia was added dropwise - A blue ppt was formed Observation when aqueous ammonia was added in excess - The blue precipitate remained
observation when aqueous ammonia was added dropwise - A blue ppt was formed Observation when aqueous ammonia was added in excess - The blue precipitate dissolved to give a dark blue solution
observation when aqueous ammonia was added dropwise - A White ppt was formed Observation when aqueous ammonia was added in excess - The white precipitate dissolved to give a colourless solution
observation when aqueous was added dropwise - A White ppt was formed Observation when aqueous ammonia was added in excess - The white precipitate remained
- 5. Multiple Choice
To a sample of A dilute sodium aqueous ammonia solution was added dropwise then in excess. What two observations were made in order for Scientists to conclude that Zn2+ions were present?
observation when aqueous ammonia was added dropwise - A red-brown ppt was formed Observation when aqueous ammonia was added in excess - The green precipitate dissolved to give a red-brown solution
observation when aqueous ammonia was added dropwise - A blue ppt was formed Observation when aqueous ammonia was added in excess - The blue precipitate remained
observation when aqueous ammonia was added dropwise - A blue ppt was formed Observation when aqueous ammonia was added in excess - The blue precipitate dissolved to give a dark blue solution
observation when aqueous ammonia was added dropwise - A White ppt was formed Observation when aqueous ammonia was added in excess - The white precipitate dissolved to give a colourless solution
observation when aqueous was added dropwise - A White ppt was formed Observation when aqueous ammonia was added in excess - The white precipitate remained
- 6. Multiple Choice
To a sample of A dilute sodium hydroxide solution was added dropwise. What observation was made in order to conclude that if a cation was present it wasn't that of a metal?
white precipitate formed
no precipitate formed
a yellow precipitate formed
a blue precipitate formed
a red-brown ppt formed
- 7. Multiple Choice
No precipitate was observed when dilute sodium hydroxide solution was added dropwise. What conclusion(s) could have been made?
the cation present was Cu2+
the cation present wasn't the cation of a metal
the cation present was NH4+
the cation present was EITHER Al 3+, Pb2+, Zn2+ or Ca2+
the cation present was Fe2+
- 8. Multiple Choice
A white precipitate was observed when dilute sodium hydroxide solution was added dropwise. What conclusion(s) could have been made?
the cation present was Cu2+
the cation present wasn't the cation of a metal
the cation present was NH4+
the cation present was EITHER Al 3+, Pb2+, Zn2+ or Ca2+
the cation present was Fe2+
- 9. Multiple Choice
No precipitate was observed when dilute sodium hydroxide solution was added dropwise. Then the resulting solution was heated and the gas evolved was tested. It was suspected that ammonium ions NH4+ ions were present in the solution What further observations were made when the gas evolved was tested?
The gas evolved turned blue litmus red and then bleached it
The gas evolved turned blue litmus red
the gas evolved made a filter paper soaked purple by potassium manganate solution was turned colourless
The gas evolved turned red litmus blue
The gas evolved turned Lime water ( Ca(OH)2) solution into a cloudy white precipitate
- 10. Multiple Choice
A white precipitate was observed when dilute sodium hydroxide solution was added dropwise. Then to the same solution sodium hydroxide was added in excess. What conclusion(s) could have been made?
the cation present was NOT Ca2+
the cations responsible for the formation of the white precipitate were amphoteric since the precipitate was able able to react with excess sodium hydroxide and form something soluble
then when the sodium hydroxide was added in excess and the white precipitate disappeared the cations present were EITHER Al 3+, Pb2+, Zn2+
At first when the sodium hydroxide was added dropwise the cations present were EITHER Al 3+, Pb2+, Zn2+ or Ca2+
the cation present was Fe2+
- 11. Multiple Choice
According to the solubility table the salts made from halide ions are all SOLUBLE except the ones that contain:
Silver ions (Ag+)
Lead (Pb2+) ions
Barium (Ba2+) ions
- 12. Multiple Choice
According to the solubility table, the salts made from halide ions are all SOLUBLE except the ones that contain Blank and Blank therefore if a solution of potassium iodide is added to a solution what two ions could be discovered if they were present:
Silver ions (Ag+)
Lead (Pb2+) ions
Barium (Ba2+) ions
- 13. Multiple Choice
If a solution of potassium iodide was added to a sample and a yellow precipitate was observed which ion(s) is present?
Silver ions (Ag+)
Lead (Pb2+) ions
Barium (Ba2+) ions
- 14. Multiple Choice
If a solution of Lead nitrate (Pb(NO3)2 was added to a sample and a YELLOW precipitate was observed which ion(s) is present?
Silver ions (Ag+)
Lead (Pb2+) ions
Iodide (I-) ions
chloride (Cl-) ions
- 15. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a WHITE precipitate was observed which ion(s) is present?
Silver ions (Ag+)
Lead (Pb2+) ions
Iodide (I-) ions
chloride (Cl-) ions
Bromide (Br-) ions
- 16. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a CREAM precipitate was observed which ion(s) is present?
Silver ions (Ag+)
Lead (Pb2+) ions
Iodide (I-) ions
chloride (Cl-) ions
Bromide (Br-) ions
- 17. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a YELLOW precipitate was observed which ion(s) is present?
Silver ions (Ag+)
Lead (Pb2+) ions
Iodide (I-) ions
chloride (Cl-) ions
Bromide (Br-) ions
- 18. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a WHITE precipitate was observed. give the Identity of the precipitate?
AgCl
AgBr
AgI
- 19. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a Cream precipitate was observed. give the Identity of the precipitate?
AgCl
AgBr
AgI
- 20. Multiple Choice
If Nitric acid and then a solution of Silver nitrate AgNO3 was added to a sample and a YELLOW precipitate was observed. give the Identity of the precipitate?
AgCl
AgBr
AgI
- 21. Multiple Choice
If Hydrochloric acid and then a solution of Barium Chloride BaCl 2 was added to a sample and a WHITE precipitate was observed.What anion was present in the solution
SO42-
CO32-
SO32-
- 22. Multiple Choice
If Hydrochloric acid and then a solution of Barium Chloride BaCl 2 was added to a sample and a WHITE precipitate was observed. Which anions are eliminated by adding hydrochloric acid to the sample?
SO42-
CO32-
SO32-
- 23. Multiple Choice
If Nitric acid and then a solution of AgNO3 was added to a sample and a precipitate was observed. Which anions are eliminated by adding the nitric acid to the sample?
SO42-
CO32-
SO32-
- 24. Multiple Choice
A beaker contains a solution (Y), It reacts with HCl it produces a gas that turns lime water cloudy, and by adding silver nitrate solution to it a yellow ppt is formed. The possible ions in this solutions are
CO32-,I-
Br -, SO42-
Cl -, CO32-
Ca2+, I-
- 25. Multiple Choice
R is a powdered metal and dilute hydrochloric acid was added and a green solution resulted. Identify the solution?
Iron (II) chloride
Iron (III) chloride
Iron
Iron (II) hydroxide
- 26. Multiple Choice
R is a powdered metal and dilute hydrochloric acid was added and a green solution resulted. Identify the metal?
Iron (II) chloride
Iron (III) chloride
Iron
Iron (II) hydroxide
- 27. Multiple Choice
R is a powdered metal and dilute hydrochloric acid was added and a green solution resulted. Sodium Hydroxide was added and a green precipitate was formed. Identify the green precipitate that was formed?
Iron (II) chloride
Iron (III) chloride
Iron
Iron (II) hydroxide
- 28. Multiple Choice
R is a powdered metal and dilute hydrochloric acid was added and a green solution resulted. To the green solution acidified silver nitrate was added. Identify the white precipitate that was formed?
Iron (II) chloride
Silver chloride
Iron
Silver hydroxide
- 29. Multiple Choice
The gas evolved when acid was added was bubbled in limewater and a white precipitate was observed identify the gas evolved?
CO2
H2
SO2
Cl2
- 30. Multiple Choice
The gas evolved when acid was added was reacted with a lighted splint a POP was observed identify the gas evolved?
CO2
H2
SO2
Cl2
- 31. Multiple Choice
The gas evolved when acid was added was reacted with A FILTER PAPER SOAKED in potassium manganate and the paper became COLOURLESS. identify the gas evolved?
CO2
H2
SO2
Cl2
- 32. Multiple Choice
The gas evolved when acid was added THE GAS was reacted with Blue litmus paper at first it became red and then it was BLEACHED. identify the gas evolved?
CO2
H2
SO2
Cl2
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