alleryGeometrical isomers of [Pt(NH₃)₂Cl₂] (square planar):
A1
B3
C2 (cis and trans)
D4
Answer & Solution
Correct answer: C. 2 (cis and trans)
Square planar MA₂B₂: 2 geometric isomers (cis and trans).
Cis is biologically active (cisplatin, anti-cancer); trans is inactive.
**The difference:** only cis can form 2 platinum-DNA bonds at right angles.
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