Answer: CO 2 absorbed.
- A H<sub>2</sub>O collected
- B N<sub>2</sub> liberated
- C SO<sub>2</sub> formed
- D CO<sub>2</sub> absorbed
Correct answer: D. CO<sub>2</sub> absorbed
Explanation: Carbon is oxidised to CO<sub>2</sub>, absorbed in KOH; its mass gives carbon, while the H<sub>2</sub>O absorbed in anhydrous CaCl<sub>2</sub> gives hydrogen.
Geometric (cis-trans) isomers of 1,2-dichloroethene differ only in the relative arrangement of groups across the rigid C=C double bond.
Concept context
General Organic Chemistry covers the rules behind all organic reactions. Covers inductive effect, resonance, hyperconjugation, types of reactions (substitution, addition, elimination), and isomerism including optical and geometric forms.
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