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प्रश्न
Account for the following:
Sc3+ is colourless whereas Ti3+ is coloured in an aqueous solution.
Account for the following:
Ti3+ is coloured whereas Sc3+ is colourless in an aqueous solution.
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उत्तर
Sc3+: [Ar]18
Ti3+: [Ar]18 3d1
Ti3+ is coloured in an aqueous solution due to the presence of one unpaired electron, whereas Sc3+ is colourless.
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संबंधित प्रश्न
Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?
Following are the transition metal ions of 3d series:
Ti4+, V2+, Mn3+, Cr3+
(Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24)
Answer the following:
1) Which ion is most stable in an aqueous solution and why?
2) Which ion is a strong oxidising agent and why?
3) Which ion is colourless and why?
Give reasons for the following:
The transition metals generally form coloured compounds.
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Account for the following:
In case of transition elements, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number.
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The orientation of an atomic orbital is governed by
Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with H2S.
Match List-I with List-II.
| List-I | List-II |
| A. Haber process | I. Fe catalyst |
| B. Wacker oxidation | II. PdCl2 |
| C. Wilkinson catalyst | III. [(PPh3)3RhCl] |
| D. Ziegler catalyst | IV. TiCl4 with Al(CH3)3 |
Choose the correct answer from the options given below:
