#### Transition and Inner Transition Elements Two Marks Question

12th Standard EM

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
15 x 2 = 30
1. Explain the oxidation states of 3d series elements.

2. Justify the position of lanthanides and actinides in the periodic table.

3. What are actinides? Give three example

4. complete the following.
a. MnO42- + H+ ⟶|?
b. C6H5CH3 $\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } }$?
c. MnO4- + Fe2+ ⟶?
d. KMnO4 $\overset { \triangle }{ \underset { Red\quad hot }{ \longrightarrow } }$ ?
e. Cr2O72- + I- + H+ ⟶?
f. Na2Cr2O7 + KCl ⟶?

5. Write ionic equation for the reaction between Cr2O7-2 iODS and Fe2+ ions in acidic medium.

6. What are coinage metals?

7. Why is Ce4+ in aqueous solution is a good oxidising agent?

8. Why do transition metals have high enthalpy of hydration?

9. Silver atom has completely filled d-orbitals (4d10) in its ground state. How can you say that it is a transition element?

10. Many industrial processes use transition metal or their compounds as catalyst. Why?

11. What is hydroformylation of olefins?

12. Write the equation involving the preparation of acetic acid from acetaldehyde.

13. What is Zeigler - Natta catalyst?

14. How are interstitial compounds formed?

15. Draw the structure of permanganate ion.