Trying to find the right answer to this..

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

Long Answer Type

281. What is the cause of lanthanide contraction?

816 Views

Short Answer Type

282. What happens when acidified potassium dichromate solution is added to potassium iodide solution?

248 Views

283.

Which out of V(IV) and V(V) is paramagnetic and why?

247 Views

284.

Why does a transition series contain only ten elements?

642 Views

285.

Why are Cd²⁺salts white?

1071 Views

286.

Which one of the two Co or Zn would be repelled by a magnetic field?

166 Views

287.
Why is electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁴ not correct for ground state of Cr (24)?

The electronic configuration of a Chromium is 1s²2s²2p⁶3s²3p⁶4s²3d⁴ not correct for ground state.
Because its unstable and every metal tends to be stable thus the most stable configuration is 1s²2s²2p⁶3s²3p⁶4s¹ 3d⁵

189 Views

288.

How is the magnetic moment of a species related to number of unpaired electrons?

211 Views

289.

Which property of the transition metals makes them good catalyst?

179 Views

290.

What is the effect of increasing pH on K₂Cr₂O₇ solution?

1499 Views