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प्रश्न
Match the solutions given in Column I and the colours given in Column II.
| Column I (Aqueous solution of salt) |
Column II (Colour) |
| (i) \[\ce{FeSO2.7H2O}\] | (a) Green |
| (ii) \[\ce{NiCl2.4H2O}\] | (b) Light pink |
| (iii) \[\ce{MnCl2.4H2O}\] | (c) Blue |
| (iv) \[\ce{CoC12,6H2O}\] | (d) Pale green |
| (v) \[\ce{Cu2 Cl2}\] | (e) Pink |
| (f) Colourless |
उत्तर
| Column I (Aqueous solution of salt) |
Column II (Colour) |
| (i) \[\ce{FeSO2.7H2O}\] | (d) Pale green |
| (ii) \[\ce{NiCl2.4H2O}\] | (a) Green |
| (iii) \[\ce{MnCl2.4H2O}\] | (b) Light pink |
| (iv) \[\ce{CoC12,6H2O}\] | (e) Pink |
| (v) \[\ce{Cu2 Cl2}\] | (f) Colourless |
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संबंधित प्रश्न
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Answer the following question:
Which element of the first transition series has highest third ionisation enthalpy?
Which of the following species has maximum magnetic momentum?
Which one among the following metals of the 3d series has the lowest melting point?
Explain the magnetic properties of d-block (or transition) elements.
For M2+/M and M3+/M2+systems, the EΘ values for some metals are as follows:
| Cr2+/Cr | −0.9 V |
| Mn2+/Mn | −1.2 V |
| Fe2+/Fe | −0.4 V |
| Cr3/Cr2+ | −0.4 V |
| Mn3+/Mn2+ | +1.5 V |
| Fe3+/Fe2+ | +0.8 V |
Use this data to comment upon:
The ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Atomic sizes
