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Salt Analysis question

2020 · 6 Sep · Shift 2 · Q13
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Salt Analysis question

2020 · 6 Sep · Shift 2 · Q13

JEE MainChemistrySalt AnalysisMCQ+4 / −1
Match the following :

Test/Method Reagent
(i) Lucas Test (a) C6H5SO2Cl/ aq. KOH
(ii) Dumas method (b) HNO3/ AgNO3
(iii) Kjeldahl’s method (c) CuO/CO2
(iv) Hinsberg test (d) Conc. HCl and ZnCl2
(e) H2SO4
  1. A
    (i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)
  2. B
    (i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)
  3. C
    (i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)
  4. D
    (i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)
View written solutionFree

Correct answer: B

  1. We match each test/method with its correct reagent.

  2. Lucas Test

    • Lucas test is used to distinguish alcohols.
    • Reagent used: conc. HCl and anhydrous ZnCl2_22​.
    • So, (i) Lucas Test→(d) Conc. HCl and ZnCl2\text{(i) Lucas Test} \to \text{(d) Conc. HCl and ZnCl}_2(i) Lucas Test→(d) Conc. HCl and ZnCl2​
  3. Dumas method

    • Dumas method is used for estimation of nitrogen.
    • The organic compound is heated with CuO, and nitrogen is measured after conversion of C and H into oxides.
    • Among the given options, this corresponds to: (ii) Dumas method→(c) CuO/CO2\text{(ii) Dumas method} \to \text{(c) CuO/CO}_2(ii) Dumas method→(c) CuO/CO2​
  4. Kjeldahl’s method

    • Kjeldahl’s method involves digestion with concentrated H2_22​SO4_44​.
    • Hence, (iii) Kjeldahl’s method→(e) H2SO4\text{(iii) Kjeldahl's method} \to \text{(e) H}_2\text{SO}_4(iii) Kjeldahl’s method→(e) H2​SO4​
  5. Hinsberg test

    • Hinsberg test for amines uses benzenesulphonyl chloride in aqueous KOH.
    • Therefore, (iv) Hinsberg test→(a) C6H5SO2Cl / aq. KOH\text{(iv) Hinsberg test} \to \text{(a) C}_6\text{H}_5\text{SO}_2\text{Cl / aq. KOH}(iv) Hinsberg test→(a) C6​H5​SO2​Cl / aq. KOH
  6. Final matching:

    (i)−(d),(ii)−(c),(iii)−(e),(iv)−(a)(i)-(d), \quad (ii)-(c), \quad (iii)-(e), \quad (iv)-(a)(i)−(d),(ii)−(c),(iii)−(e),(iv)−(a)
  7. Compare with options:

    • This corresponds to Option B.

Answer: B\boxed{\text{B}}B​

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