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Chemistry · 2026 · 2 marks
CBSE 2026 · Region 4 · Set 2 · Q18
Write the formulas for the following coordination compounds: (a) Mercury(I) tetrathiocyanato-S-cobaltate(III) (b) Dichloridobis (ethane-1,2-diamine)…
Write the formulas for the following coordination compounds :
(a)
Mercury(I) tetrathiocyanato-S-cobaltate(III)
(b)
Dichloridobis (ethane-$\displaystyle 1,2$-diamine) platinum(IV) nitrate
Marking-scheme solution
(a)
Hg[Co(SCN)$\displaystyle 4$]
(b)
[Pt(en)2Cl2](NO3)$\displaystyle 2$
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.