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d and f Block Elements
NEET Chemistry • 10 questions • Free on ExamBattle
Practice Questions
Q1
Transition elements exhibit variable oxidation states because of:
- A. Presence of large atomic radii
- B. Small energy difference between ns and (n-1)d orbitals
- C. High ionization energy
- D. Absence of inner electrons
Q2
The colour of transition metal compounds is due to:
- A. Large atomic size
- B. d-d electronic transitions
- C. High nuclear charge
- D. Metallic bonding
Q3
The element with highest melting point among transition elements is:
- A. Iron
- B. Tungsten (W)
- C. Platinum
- D. Chromium
Q4
Potassium dichromate (K₂Cr₂O₇) acts as an oxidising agent in:
- A. Basic medium
- B. Acidic medium
- C. Neutral medium only
- D. All media equally
Q5
The correct order of 4f orbitals filling in lanthanoids is:
- A. Ce to Lu (Z=58 to 71)
- B. La to Yb (Z=57 to 70)
- C. Pr to Lu (Z=59 to 71)
- D. La to Lu (Z=57 to 71)
Q6
KMnO₄ in acidic solution is reduced to:
- A. MnO₂ (Mn⁴⁺)
- B. Mn²⁺
- C. MnO₄²⁻ (Mn⁶⁺)
- D. MnO (Mn²⁺)
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