ICSE Class 10 The d- and f-Block Elements — Mock Test (2027)
Free online mock test for The d- and f-Block Elements (ICSE Class 10 Chemistry) — 80 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the The d- and f-Block Elements chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.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
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2.On increasing the pH (adding alkali) of a potassium dichromate solution, the orange dichromate ion is converted to:
- A.Yellow chromate ion (CrO4 2-)
- B.Green Cr3+ ion
- C.Blue chromium peroxide
- D.Purple permanganate ion
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3.![melting_points_transition_series.png]() Look at the right-hand end of the plot, where the labels Cu, Ag and Au are clustered. Compared with the peak elements in the middle of each curve, what does the figure show about the melting points of these three end-of-series metals?
- A.They drop to the lowest values, near the bottom of the vertical scale
- B.They rise to the highest values on the plot
- C.They stay roughly equal to the middle peak values
- D.They are missing because no data is plotted for them
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4.Which member of the lanthanoid series is well known to exhibit the +4 oxidation state?
- A.Cerium
- B.Lanthanum
- C.Gadolinium
- D.Lutetium
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5.The unique positive standard electrode potential (E0 = +0.34 V) of the Cu2+/Cu couple accounts for the fact that copper:
- A.Cannot liberate hydrogen from acids
- B.Readily liberates hydrogen from dilute acids
- C.Is the most reactive metal of the series
- D.Forms only +1 oxidation state
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