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In the Carius method, the halogen in an organic compound is estimated by precipitating it as:

Answer: Silver halide (AgX).

  • A Silver halide (AgX)
  • B Barium sulphate (BaSO<sub>4</sub>)
  • C Ammonium phosphomolybdate
  • D Sodium halide (NaX)

Correct answer: A. Silver halide (AgX)

Explanation: The compound is heated with fuming HNO<sub>3</sub> and AgNO<sub>3</sub> so the halogen is converted to insoluble silver halide, which is weighed.

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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