WorksheetsQualitative Analysis
Total questions: 27
Worksheet time: 18mins
Name
Class
Date
1.
Which cation gives a green precipitate with NaOH?
a)
Fe+2
b)
Al+3
c)
Ca+2
d)
Cu+2
e)
Fe+3
2.
Which cation gives a brick red precipitate with NaOH?
a)
Fe+2
b)
Al+3
c)
Ca+2
d)
Cu+2
e)
Fe+3
3.
Which cation gives a blue precipitate with NaOH?
a)
Fe+2
b)
Al+3
c)
Ca+2
d)
Cu+2
e)
Fe+3
4.
Which cation gives a soluble white precipitate with excess NH4OH?
a)
Ca+2
b)
Al+3
c)
Zn+2
d)
Mg+2
e)
Pb+2
5.
All of the following salts are soluble except...
a)
Lead(II) nitrate
b)
Sodium carbonate
c)
Magnesium chloride
d)
Barium sulphate
6.
What does the gas/ gases collected tell us about the salt?
a)
Type of cation
b)
Type of anion
c)
Reactivity with oxygen
d)
Volatility
7.
A solution X when added into sodium carbonate solution turns limewater cloudy. which of the following is solution X?
a)
Aqueous ammonia solution
b)
Calcium hydroxide solution
c)
Vinegar
d)
Magnesium nitrate solution
8.
When solid Y is heated strongly, a gas that turns limewater milky is produced, leaving a white residue. Which of the following could be solid Y?
a)
Zinc carbonate
b)
Potassium carbonate
c)
Lead(II) carbonate
d)
Magnesium carbonate
9.
How can aluminium sulphate and zinc sulphate solution be differentiated?
a)
Addition of silver nitrate solution
b)
Addition of aqueous ammonia
c)
Addition of sodium hydroxide solution
d)
Addition of barium chloride solution
10.
What reagent can be used to differentiate hydrochloric acid and sulphuric acid?
a)
Silver nitrate solution
b)
Sodium hydroxide solution
c)
Sodium carbonate solution
d)
Ammonia solution
11.
What is the observation when potassium iodide solution is added to a lead(II) nitrate solution?
a)
No changes
b)
A white precipitate is formed
c)
A yellow precipitate is formed
d)
Effervescence is observed
12.
Salt X is added to sodium hydroxide solution and the mixture is heated. The gas evolved turns moist red litmus paper blue. What ion is present in salt X?
a)
Nitrate ion
b)
Ammonium ion
c)
Carbonate ion
d)
Lead(II) ion
13.
NaOH is added to an unknown solution. A blue ppt forms. The formula of the ion is:
a)
Fe
b)
Fe3+
c)
Fe2+
d)
Cu2+
14.
NaOH is added to an unknown solution. A orange-brown ppt forms. The formula of the ion is:
a)
Fe2+
b)
Fe3+
c)
Cu2+
d)
Cl-
15.
NaOH is added to an unknown solution. A strong smell is given off. The formula of the ion is:
a)
Cl-
b)
Br2
c)
NH4+
d)
I-
16.
Anyhdrous copper sulphate is added to water. The colour change is from:
a)
White-Blue
b)
Pink-Blue
c)
Blue-Pink
d)
Blue-White
17.
How do you test for hydrogen gas?
a)
Relight a glowing splint
b)
Makes a squeaky pop with a lit splint
c)
Turns limewater milky
d)
Bleaches damp limtus paper
18.
How do you test for oxygen gas?
a)
Makes a squeaky pop with a lit splint
b)
Relights a glowing splint
c)
Bleaches damp litmus paper
d)
Turns limewater milky
19.
How do you test for carbon dioxide gas?
a)
Turns limewater milky
b)
Relights a glowing splint
c)
Makes a squeaky pop with a splint
d)
Bleaches damp litmus paper
20.
How do you test for Chlorine gas?
a)
Bleaches damp litmus paper
b)
Makes a squeaky pop with a lit splint
c)
Relights a glowing splint
d)
Turns limewater milky
21.
When we test for Nitrate, which gas is evolved ?
a)
Nitrogen Dioxide
b)
Ammonia
c)
Ammonium
d)
Nitrogen trioxide
22.
NaOH + Unknown solution + aluminium foil - warm the reaction.
Which anion are we testing for ?
Which anion are we testing for ?
a)
Nitrite (NO2-)
b)
Nitrate (NO3-)
c)
Sulphite (SO3-2)
d)
Sulphate (SO4-2)
23.
How would you conclude Ammonia gas is liberated ?
a)
Blue litmus turn Red
b)
Red litmus turn Blue
c)
Red litmus turn blue, pungent smell
d)
Blue litmus turn red, pungent smell
24.
Which two reagents are required for Metals Cation testing?
a)
NaOH, HCl
b)
NH4OH, NH3
c)
NH4OH, HNO3
d)
NaOH , NH3
25.
Which gas bleaches a damp litmus paper ?
a)
Hydrogen
b)
Ammonia
c)
Chlorine
d)
Carbondioxide
26.
Which pair of reagents are used to precipitate insoluble hydroxides form solutions of the salts?
a)
aq. NaOH and aq. NH3
b)
NaOH and HCl
c)
HCl and CaO
d)
Aluminum foil and Litmus paper
27.
To add an excess of a reagent, means
a)
to add the reagent until no further change is observed.
b)
to add the reagent until it is colorless
c)
to add the reagent until all is dissolved
d)
to add the reagent until no more precipitate is formed
100 %
