Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Chemistry : The d-And-f-Block Elements

Long Answer Type

161. The chemistry of the actinoid elements is not so smooth as that of the lanthanoids. Justify this statement by giving some examples from the oxidation state of these elements.

181 Views

Short Answer Type

162. Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

175 Views

163.

Use Hund's rule to derive the electronic configuration of Ce³⁺ ion, and calculate its magnetic moment on the basis of 'spin only' formula.

1654 Views

Long Answer Type

164. Name the members of the lanthanoid series which exhibit +4 oxidation states and those which exhibit + 2 oxidation states. Try to correlate this type of behaviour with the electronic configurations of these elements.

1010 Views

Short Answer Type

165. Compare the chemistry of the actinoids with that of lanthanoids with reference to:
(i) electronic configuration (ii) oxidation states and (iii) chemical reactivity (iv) Atomic size

549 Views

166.

Explain:
CrO₄^2– is a strong oxidizing agent while MnO₄^2– is not.

217 Views

167.

Explain:
Zr and H_f have identical sizes.

166 Views

168.

Explain:
The lowest oxidation state of manganese is basic while the highest is acidic.

488 Views

169.

Explain:
Mn(II) shows maximum paramagnetic character amongst the divalent ions of the first transition series.

368 Views

Long Answer Type

170. 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 points:
(i) electronic configuration (ii) oxidation states (iii) ionisation enthalpies and (iv) atomic sizes.

205 Views