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🧪 Chemistry  ·  Organic Chemistry: Basic Principles and Techniques  ·  NEET & JEE

In Liebig's method for estimating carbon and hydrogen, the carbon content is calculated from the mass of:

Answer: CO2 absorbed.

  • A H2O collected
  • B N2 liberated
  • C SO2 formed
  • D CO2 absorbed

Correct answer: D. CO2 absorbed

Explanation: Carbon is oxidised to CO2, absorbed in KOH; its mass gives carbon, while the H2O absorbed in anhydrous CaCl2 gives hydrogen.

cis isomerClHClHsame side(Cl groups together)trans isomerClHHClopposite sides(Cl groups apart)

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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