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.

The d-And-f-Block Elements

Short Answer Type

211.

Give Possible reason for the fact that the radii of Mn²⁺ ions of the first row transition metals. Ti²⁺ (Z = 22) to Cu²⁺ (Z = 29) decrease with increasing atomic number.

153 Views

212.

Explain the catalytic action of Fe(III) between the reaction of I^– and persulphate ion S₂O₈^2–.

141 Views

213. What is the reason of the greater tendency of transition metals to form complex compouds?

443 Views

214. Why the transition metals and their compounds are widely used as catalysts?

161 Views

215.

What can be inferred from the magnetic moment values of the following complex species?

Example	Magnetic Moment (BM)
K₄[Mn(CN)₆]	2.2
[Fe(H₂O)₆]²⁺	5.3
K₃ [Mn Cl₄]	5.9

450 Views

216. What are interstitial compounds? What are their main characteristics?

197 Views

217.
Explain the structures of dichromate and chromate ion.

The chromate ion (CrO₄^2–) has a tetrahedral shape, whereas dichromate ion has two tetrahedral units with one common oxygen having Cr—O—Cr bond angle of 126°.