The d and f-Block Elements questions
808 published questions with worked solutions.
- How many of the following have 4 unpaired electrons? Cr^ 2+ , Co^ 3+ , Cu^ 2+ , Ni^ 2+
- How many out of the following have more paramagnetic character than the Ti^ 2+ ion? Sc^ 3+ , Cr^ 2+ , Co^ 2+ , Fe^ 2+ , Mn^ 2+ ,...
- How many of the following are lanthanoids? Uranium, praseodymium, erbium, gadolinium, curium, hafnium, osmium, iridium
- The number of f-electrons in the Ho^ 2+ ion is _____. [At. no. of Ho = 67]
- Among the elements given below, the total number of actinoids is _____. Ce, Eu, Th, No, Pa, Pu, Tm
- Consider the following transition metal ions: V^ 2+ , Fe^ 2+ , Zn^ 2+ , Ti^ 4+ , Mn^ 3+ , Sc^ 3+ . How many of these ions are...
- Among the ions given below, the total number of diamagnetic species is _____. Yb^ 2+ (Z=70), Lu^ 3+ (Z=71), La^ 3+ (Z=57), Ce^ 4+...
- The highest possible oxidation state of plutonium is _____.
- The observed electronic configuration of protactinium (atomic number = 91) is [Rn]5f^x ,6d^y ,7s^z. The value of (x+y+z) is _____.
- [Sc(H_2O)_6]^ 3+ ion is **[JCECE 2010]**
- The ion which exhibits green colour is
- **Statement 1:** Ions with more than five 3d electrons usually have a slightly larger magnetic moment than calculated from =...
- When MnO_2 is fused with KOH, a coloured compound formed, the product and its colour is [IIT JEE 2003]
- Which pair of compounds is expected to show similar colour in aqueous medium? [IIT JEE 2005]
- Match List I with List II and select the correct answer using the codes given below the lists. Column-I (A) Cr^ 3+ (B) Fe^ 2+ (C)...
- Statement 1: Oxalates and carbonates of lanthanides are almost insoluble in water. Statement 2: Salts of lanthanides usually...
- Colour of transition metal ions are due to
- The common oxidation state of the elements of lanthanide series is
- The highest magnetic moment will be shown by
- The electronic configuration of Gd (At. no. 64) is
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