ICSE Class 10 The d- and f-Block Elements — Mock Test

Free online mock test for The d- and f-Block Elements (ICSE Class 10 Chemistry) — 80 competency-based questions with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Which set of atomic numbers consists entirely of inner transition (f-block) elements?
   • A.59, 95, 102
   • B.29, 74, 104
   • C.29, 59, 74
   • D.74, 102, 104
2. 2.In acidic medium, MnO4- is reduced to Mn2+ (5 electrons) but in neutral or faintly alkaline medium it is reduced to MnO2 (3 electrons). The factor that decides which reduction occurs is:
   • A.The hydrogen ion concentration (pH) of the solution
   • B.The temperature only
   • C.The colour of the solution
   • D.The amount of K+ ions present
3. 3.Mischmetall, an important alloy containing lanthanoid metals, consists chiefly of:
   • A.About 95% lanthanoid metal and about 5% iron with traces of S, C, Ca and Al
   • B.Equal parts of copper and zinc
   • C.About 95% iron with traces of lanthanoid metals
   • D.Copper and tin in the ratio 9:1
4. 4.Why is Cr2+ a stronger reducing agent than Fe2+?
   • A.Oxidation of Cr2+ gives the stable half-filled t2g (d3) configuration of Cr3+, whereas Fe2+ loses its stable d6 to give d5
   • B.Cr2+ has a smaller ionic radius than Fe2+
   • C.Fe2+ has more unpaired electrons than Cr2+
   • D.Cr3+ is coloured while Fe3+ is colourless
5. 5.Consider the statements: (I) The atomic radii of the 4d series are larger than those of the corresponding 3d series. (II) The atomic radii of the 5d series are nearly equal to those of the 4d series. Which is correct?
   • A.Both I and II are correct
   • B.Only I is correct
   • C.Only II is correct
   • D.Neither I nor II is correct