Chemistry · Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus
Which of the following statements is/are correct? This question has multiple cor
Which of the following statements is/are correct? This question has multiple correct options
- A. Liebig's method is used for the quantitative estimation of both \( C \) and \( H \)
- B. Dumas method is used for the quantitative estimation of \( \mathrm{N} \) in all nitrogen-containing organic compounds.
- C. In Liebig's combustion method, dry CuO is used.
- D. Silver salt method is a chemical method for the determination of equivalent mass of organic acids.
Step-by-step solution
A is correct: Liebig's combustion method simultaneously estimates carbon (as CO2) and hydrogen (as H2O). B is incorrect because Dumas method is not suitable for all nitrogen-containing compounds (e.g., compounds with N-N bonds may give unreliable results). C is correct: dry CuO is used as an oxidant in Liebig's method. D is correct: the silver salt method determines equivalent mass by precipitating the silver salt of the acid. Since the question has multiple correct options (A, C, D), A is chosen as a representative correct statement.
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