Frank ICSE Solutions for Class 10 Chemistry Chapter 4-Analytical Chemistry

Frank ICSE Solutions for Class 10 Chemistry Chapter 4-Analytical Chemistry

PAGE NO : 75
Solution 1:

1. Cuprous salts = Colourless
2. Cupric salts = Blue
3. Aluminium salts = Colourless
4. Ferrous salts= Light green
5. Ferric salts = Yellow
6. Calcium salts = Colourless

Solution 2:

Solution 3:

Solution 4:
K₂SO_4.

Solution 5:

Solution 6:

Solution 7:

Solution 8:

Solution 9:
Examples of amphoteric hydroxides are: Zn(OH)2, Al(OH)3.

Solution 10:

Solution 11:

PAGE NO : 76
Solution 12:

Solution 13:
The chloride of a metal which is soluble in excess of ammonium hydroxide is zinc chloride i.e. ZnCl2.

Solution 14:

Solution 15:

1. PbO
2. Al2O3
3. Na2ZnO2

Solution 16:

1. transition, Cr³⁺, Fe²⁺, MnO₄^4-.
2. Zn(OH)₂
3. NH₄Cl
4. Al₂O₃, Al
5. NH₄OH

Solution 1992-1:

1. Addition of KCN
2. Addition of excess of NaOH.
3. Addition of excess ofNH₄OH

Solution 1993-1:

PAGE NO : 77
Solution 1995-1:

1. The metal ion present in solution A is Pb²⁺
   .
2. The cation present in solution B is Cu²⁺. The probable colour of solution B is blue.

Solution 1996-1:

Solution 1996-2:
The solutions for the tests will be prepared by dissolving the given powders separately in water.

1. Solution of Calcium carbonate:
   Calcium carbonate is CaCO₃ and contains Ca²⁺ ions. Sodium hydroxide solution NaOH can be used to identify Ca²⁺ since its addition to calcium carbonate solution will give white precipitates of Ca(OH)2 which are sparingly soluble in excess of NaOH.

1. Solution of Lead carbonate:
   Lead carbonate is PbCO₃and contains Pb2+ ions. Ammonium hydroxide solution NH4OH can be used to identify Pb²⁺ since its addition to lead carbonate solution will give white precipitates of Pb(OH)2 which are insoluble in excess of NH4OH.
2. Solution of Zinc carbonate:
   Zinc carbonate is ZnCO3 and contains Zn²⁺ ions. Sodium hydroxide solution NaOH can be used to identify Zn²⁺ since its addition to zinc carbonate solution will give white gelatinous precipitates of Zn(OH)₃ which are soluble in excess of NaOH.

Solution 1996-3:

Solution 1997-1:

Solution 1998-1:

Solution 1999-1:

Solution 2000-1:

PAGE NO : 78
Solution 2001-1:

Solution 2003-1:

Solution 2003-2:

Solution 2004-1:

PAGE NO : 79
Solution 2005-1:

1. B and E (Iron (II) sulphate and Magnesium sulphate)
2. C and F (Iron (III) chloride and Zinc chloride)
3. D (Lead nitrate)
4. A (Copper nitrate)
5. F (Zinc chloride)

Solution 2006-1:

Solution 2009-1:
C ( Aluminium oxide)

Solution 2009-2:

1. P is Ferric chloride
2. Q is an ammonium salt
3. R is ferrous sulphate

Solution 2009-3:

1. When BaCl₂
2.  solution is added to the given solution ZnSO₄
3. gives a white precipitate while no precipitate is obtained with ZnCl₂ solution.
4. When NaOH solution is added to the given solution, iron (II) chloride gives dirty green precipitate while reddish brown precipitate is obtained with iron(III) chloride.