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Analytical Chemistry

30 questions · Chemistry · IIT JAM
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Analytical Chemistry

30 questions · Chemistry · IIT JAM

  1. In the following transformation, the number of α and β particles emitted, respectively, are 88223​Ra⟶82207​Pb2025 · Q16 · MCQ
  2. In alkaline medium, which of the following metal ion(s) form(s) red precipitate/coloration with dimethylglyoxime?2025 · Q32 · Multiple correct
  3. 1.84 g of a mixture of CaCO 3​ and MgCO 3​ is heated till no further weight loss. The weight of the residue is 0.96 g. The % composition of CaCO 3​ in the mixture is ​. (round off to two decimal places)…2025 · Q54 · Numerical
  4. The wavelength of the γ-ray emitted in 56137m​Ba→56137​Ba+γ-ray(0.66 MeV) is ​ Å. (rounded off to three decimal places) [Given: h=6.626×10−34 J s…2024 · Q60 · Numerical
  5. An alkaline (NaOH) solution of a compound produces a yellow colored solution on addition of NaBO₃. The compound is2023 · Q10 · MCQ
  6. In a gravimetric estimation of Al, a sample of 0.1000 g AlCl3​ is precipitated with 8-hydroxyquinoline. The weight of the precipitate is ​ g.2023 · Q60 · Numerical
  7. The number of significant figures in 5.0820 × 10^{2} is ​.2022 · Q47 · Numerical
  8. The number of β particles emitted in the nuclear reaction 92238​U→82206​Pb is ​.2022 · Q52 · Numerical
  9. A salt mixture (1.0 g) contains 25 wt% of MgSO₄ and 75 wt% of M₂SO₄. Aqueous solution of this salt mixture on treating with excess BaCl₂ solution results in the precipitation of 1.49 g of BaSO₄. The atomic mass of M in g mol⁻¹ (rounded off…2021 · Q52 · Numerical
  10. In qualitative inorganic analysis of metal ions, the ion which precipitates as sulfide in the presence of H 2​ S in warm dilute HCl is2019 · Q18 · MCQ
  11. The true statement(s) regarding the brown ring test carried out in the laboratory for the detection of NO₃⁻ is/are2019 · Q34 · Multiple correct
  12. Which plot represents a spectrophotometric titration, where the titrant alone absorbs light in the visible region?2018 · Q12 · MCQ
  13. The decay modes of 14C and 14O are2018 · Q15 · MCQ
  14. In a saturated calomel electrode, the saturation is with respect to2018 · Q32 · Multiple correct
  15. Choose the CORRECT answer(s) with respect to the magnesium-EDTA titration carried out in the pH range 7 – 10.5, using Solochrome black as indicator2018 · Q34 · Multiple correct
  16. The volume of 0.3 M ferrous ammonium sulphate solution required for the completion of redox titration with 20 mL of 0.1 M potassium dichromate solution is ​ mL.2018 · Q42 · Numerical
  17. 24Na decays to one-fourth of its initial amount in 29.8 hours. Its decay constant is hour −1 (rounded up to four decimal places).2018 · Q52 · Numerical
  18. The metal ion (M²⁺) in the following reaction is M2++S2−⟶Black precipitatehot conc. HNO3​​White precipitate2017 · Q15 · MCQ
  19. In the following Latimer diagram, the species that undergoes disproportionation reaction is MnO4−​+0.56​MnO42−​+0.27​MnO43−​+0.93​MnO2​+0.15​Mn2​O3​−0.25​Mn(OH)2​−1.56​Mn…2017 · Q2 · MCQ
  20. A yellow precipitate is formed upon addition of aqueous AgNO₃ to a solution of2017 · Q3 · MCQ
  21. The indicator(s) appropriate for the determination of end point in the titration of a weak acid with a strong base is/are2017 · Q33 · Multiple correct
  22. A radioactive element undergoes 80% radioactive decay in 300 min. The half-life for this species in minutes is2017 · Q52 · Numerical
  23. The amount of bromine (atomic wt. = 80) required (in gram) for the estimation of 42.3 g of phenol (molecular wt. = 94 g mol⁻¹) is2017 · Q54 · Numerical
  24. Acetic acid content in commercial vinegar was analyzed by titrating against 1.5 M NaOH solution. A 20 mL vinegar sample required 18 mL of titrant to give endpoint. The concentration of acetic acid in the vinegar (in mol L⁻¹) is __.2016 · Q44 · Numerical
  25. The isotope ²¹⁴B₄Po undergoes one alpha and one beta particle emission sequentially to form an isotope “X”. The number of neutrons in “X” is __.2016 · Q47 · Numerical
  26. Indicator used in redox titration is2016 · Q6 · MCQ
  27. The reagent ‘oxine’ commonly used in analytical chemistry is2015 · Q13 · MCQ
  28. The amount (in grams) of potassium dichromate (MW=294) present in 75 mL of 0.16M aqueous solution is ​2015 · Q42 · Numerical
  29. A 2.5×10−4 M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when measured in a cuvette with a path length of 1.5 cm. The absorbance of 1.5×10−3 M solution of the same…2015 · Q52 · Numerical
  30. A wood specimen containing 14 C taken from an ancient palace showed 24 counts in 3 minutes per gram of carbon in a detector. However, a fresh wood showed 52 counts in 2 minutes per gram of carbon. Assuming no background signal in the…2015 · Q53 · Numerical