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Answer the following: Give a reason: Transition elements show high melting point. Give a reason…
Answer the following:
(i)(a)[1.0]
Give a reason: Transition elements show high melting point.
(i)(b)[1.0]
Give a reason: Though $\text{Zr}$ ($Z = 40$) belongs to 4d transition series and $\text{Hf}$ ($Z = 72$) belongs to 5d transition series, yet the two cannot be separated easily.
(i)(c)[1.0]
Give a reason: $\text{Cu}^{2+}$ and $\text{Fe}^{3+}$ generally form coloured compounds.
(ii)(a)[1.0]
Complete and balance the following reaction:
$\text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 + \text{Na}_2\text{SO}_3 \longrightarrow$
(ii)(b)[1.0]
Complete and balance the following reaction:
$\text{KMnO}_4 + \text{H}_2\text{SO}_4 + \text{H}_2\text{S} \longrightarrow$
Answer
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From ISC 2025 Improvement Chemistry Paper 1, question 20.