General properties of transition elements

2012 AIPMT-MAINS 2 questions

1. 1 The d- and f-Block Elements
   The catalytic activity of transition metals and their compounds is ascribed mainly to
   A their chemical reactivity B their magnetic behaviour C their unfilled d-orbitals D their ability to adopt variable oxidation states
   Check Answer
2. 2 The d- and f-Block Elements
   Which one of the following does not correctly represent the correct order of the property indicated against it?
   A Ti < V < Mn < Cr : increasing 2nd ionization enthalpy B Ti < V < Cr < Mn : increasing number of oxidation states C $Ti^{3+} < V^{3+} < Cr^{3+} < Mn^{3+}$ : increasing magnetic moment D Ti < V < Cr < Mn : increasing melting points
   Check Answer