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

Short Answer Type

181.

Explain the following facts:
Transition metals form coloured complexes.

175 Views

182.

Give reasons:
Among transition metals, the highest oxidation state is exhibited in oxoanions of a metal.

434 Views

183.

Give reasons:
Ce⁴⁺ is used as an oxidising agent in volumetric analysis.

422 Views

184.

Give reasons:
Zn²⁺ salts are white while Cu²⁺ salts are blue.

186 Views

185.

Why La, Gd and Lu has low value of 3rd ionisation enthalpies?

301 Views

186. Why is cerium a good analytical reagent?

317 Views

187. Given below are the electrode potential values, E° for some of the first row of transition elements:
Elements V(23) Cr(24) Mn(25)Fe(26)Co(27)Ni(28) Cu(29)
E°_M²⁺/M(V) –1.18 – 0.91 – 0.44 – 0.28 –0.28 –0.25 +0.34
Explain the irregularities in these values on the basis of electronic structures of atoms.

279 Views