19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The manganate and permanganate ions are tetrahedral, due to: (NEET 2019)
Which of the following ions has the maximum number of unpaired d electrons ?
Which one of the following ions exhibits d-d transition and paramagnetic as well? (NEET 2018)
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code (NEET 2018) Column I Column II A. Co3+ i. 8 B.M. B. Cr…
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)
The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are (NEET-I 2016)
Which of the following processes does not involve oxidation of iron? (NEET 2015)
Which of the following does not possess unpaired electrons ?
Which of the following electronic configurations represents Fe3+ ?
Which of the following statements about the interstitial compounds is incorrect? (NEET 2013)
Which of the following ions is expected to the coloured in solution ?
The transition elements are
Sc (Z = 21) is a transition element but Zn (Z = 30) is not because (NEET 2013)
The transition metals sometimes form nonstoichiometric compounds. These compounds have (a) definite structures and definite proportions
Which of the following oxides of chromium is amphoteric in nature ?
The catalytic activity of transition metals and their compounds is ascribed mainly to (Mains 2012)
Identify the alloy containing a non-metal as a constituent in it. (AIPMT-2012)
Which of the following group of transition metals is called coinage metals? (RPMT 2008)
Which of the following compounds is green in colour ?
Which of the following compounds is coloured ? (AIIMS 2008)
What is the correct order of spin only magnetic moment (in BM) of Mn2+, Cr2+ and Ti2+? (AFMC 2008)
Essential component of amalgam is (RPMT 2007)
Reason of passivity of iron is (RPMT 2007)
Acidified potassium permanganate solution is decolourised by (AFMC 2007)
Which one of the following ions is the most stable in aqueous solution ? (At. no. Ti = 22, V = 23, Cr = 24, Mn = 25) (CBSE AIPMT 2007)