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Chemistry · 2025 · 2 marks
The d-and f-Block ElementsGeneral Properties of the Transition Elements (d-Block)2 marksUnderstandvery short answer
CBSE 2025 · Region 2 · Set 1 · Q19
Examine the following observations: 2 × 1 (a) Transition elements generally form coloured compounds. (b) Zinc is not regarded as a transition element.
Examine the following observations: $\displaystyle \mathbf{2} \boldsymbol{\times} \mathbf{1}$
(a)
Transition elements generally form coloured compounds.
(b)
Zinc is not regarded as a transition element.
Marking-scheme solution
(a)
Due to the presence of unpaired electron in d sub shell/ due to d-d transition.
(b)
Due to the presence of fully filled d- subshell in ground state and oxidized state.
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.