MCQ
Bond length between carbon-carbon in ethylene molecule is......$ \mathop A\limits^o $
- A$1.54$
- ✓$1.35$
- C$1.19$
- D$2.4$

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$(I)\, H_2S_2O_6$ $(II)\, H_2S_2O_3$ $(III)\,H_2S_2O_5$