+2 Chemistry – Practical
V.SANKAR MSc.Bed.,
QUESTIONS FOR HIGHER SECONDARY PUBLIC PRACTICAL
EXAMINATION
VOLUMETRIC ANALYSIS
1. Compare the normalities of Potassium permanganate (KMnO4) solutions (A) &
(B) and estimate the amount of crystalline potassium permanganate (KMnO4)
present in 500 ml of the given weaker solution. You are provided with a standard
solution of ferrous ammonium sulphate (FAS) containing 39.2 g in one litter.
2. Compare the normalities of ferrous ammonium sulphate (FAS) solutions (A) & (B)
and
estimate the amount of crystalline ferrous ammonium sulphate (FAS)
present in 750 ml of the given stronger solution. You are provided with a
standard solution of Potassium permanganate (KMnO4) containing 3.16 g in one
litter.
3. Compare the normalities of ferrous sulphate (FeSO4) solutions (A) & (B) and
estimate the amount of crystalline ferrous sulphate (FeSO4) present in 1250 ml of
the given weaker solution. You are provided with a standard solution of
Potassium permanganate (KMnO4) containing 1.6 g in 500 ml.
4. Estimate the amount of crystalline oxalic acid present in 500 ml of the given
solution. You are provided with 0.1N of ferrous ammonium sulphate (FAS)
solution as a standard solution and potassium permanganate (KMnO4) as a link
solution.
5. Estimate the amount of crystalline ferrous ammonium sulphate (FAS) present in
750 ml of the given solution. You are provided with 0.1025 N of oxalic acid as a
standard solution and potassium permanganate (KMnO4) as a link solution.
6. Estimate the amount of crystalline ferrous sulphate (FeSO4) present in 250 ml of
the given solution. You are provided with 0.0952Nof ferrous ammonium sulphate
(FAS) solution as a standard solution and potassium permanganate (KMnO 4) as a
link solution.
Note:
 Amount and Normality mentioned in the above questions may be changed.
 Different normality for link solutions should be given for odd and even
number.
Page 1 of 4
+2 Chemistry – Practical Questions & Marking scheme
+2 Chemistry – Practical
V.SANKAR MSc.Bed.,
SYSTEMATIC ANALYSIS OF SIMPLE SALT
XII - CHEMISTRY
LIST OF SALTS:
S.NO.
SALT.NO.
NAME OF SALTS
CHEM.FORMULA
1
1
LEAD NITRATE
Pb(NO3)2
2
2
ALUMINIUM SULPHATE
Al2(SO4)3
3
3
ALUMINIUM NITRATE
Al(NO3)3
4
4
ZINC SULPHIDE
ZnS
5
5
ZINC SULPHATE
ZnSO4
6
6
CALCIUM CARBONATE
CaCO3
7
7
BARIUM CHLORIDE
BaCl2
8
8
MAGNESIUM CARBONATE
MgCO3
9
9
MAGNESIUM SULPHATE
MgSO4
10
10
AMMONIUM CHLORIDE
NH4Cl
11
11
AMMONIUM CARBONATE
(NH4)2CO3
12
12
AMMONIUM SULPHATE
(NH4)2SO4
Page 2 of 4
+2 Chemistry – Practical Questions & Marking scheme
+2 Chemistry – Practical
V.SANKAR MSc.Bed.,
MARKING SCHEME FOR XII – CHEMISTRY PRACTICAL
MAXIMUM MARKS: 50
INTERNAL ASSESMENT:
1. Record work
5 marks
Attendance
5 marks
20 MARKS
10 marks
2. Project work
10 marks
EXTERNAL MARKS:
30 MARKS
Quantitative Analysis (Volumetric Analysis)
18 marks
Qualitative Analysis (Salt Analysis)
12 marks
MARKING SCHEME FOR VOLUMETRIC ANALYSIS:
1.
2.
3.
4.
5.
Simple or Short procedure
Titration – I Table & Titre Value
Titration – II Table & Titre Value
Titration – I Calculation
Titration – II Calculation
5 marks
1+4 marks
1+4 marks
1mark
1mark
_________
18 marks
_________
NOTE:
Titre Value up to 2% error
4marks
2% to 3% error
3marks
3% to 4% error
2marks
4% and above
1mark
Note:
 Usage of Calculator is allowed.
 Repetition of Questions in Volumetric analysis can be permitted if it
is required.
Page 3 of 4
+2 Chemistry – Practical Questions & Marking scheme
+2 Chemistry – Practical
V.SANKAR MSc.Bed.,
MARKING SCHEME FOR SALT ANALYSIS:
12 MARKS
Preliminary Tests:
(Solubility, Action of heat, Flame test, Ash test)
2 marks
Test for Acid radicals:
(Action of dil. HCl, Cu – turnings test, Chromyl Chloride Test,
Action of NaOH)
2 marks
Preparation of Sodium Carbonate Extract & Tests
2 marks
Original Solution preparation & Group Separation
1+2 marks
(For Ammonium Salts Group Separation has to be written)
Confirmatory Test for Basic radical (any one test)
Result:
1mark
Acid radical – 1mark
Basic radical – 1mark
2 marks
Total:
12 marks
************** All the Best ***************
V.SANKAR MSc.,BEd.,
PG ASSISTANT IN CHEMISTRY,
Page 4 of 4
+2 Chemistry – Practical Questions & Marking scheme