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Practical Organic Chemistry

90 questions · Chemistry · JEE Main
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Practical Organic Chemistry

90 questions · Chemistry · JEE Main

  1. 0.1 mol of the following given antiviral compound (P) will weigh ​×10−1 g(nearest integer). (Given : molar mass in gmol−1H:1,C:12, N:14,O:16, F:19,I:127… Includes diagram2025 · 2 Apr · Shift 1 · Q22 · Numerical
  2.  Match List - I with List - II.   Choose the correct answer from the options given below :  Includes table2025 · 2 Apr · Shift 2 · Q18 · MCQ
  3. In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm Hg pressure. The percentage composition of nitrogen in the compound (Aqueous tension at 300 K=15 mmHg…2025 · 2 Apr · Shift 2 · Q7 · MCQ
  4. In Dumas' method for estimation of nitrogen 1 g of an organic compound gave 150 mL of nitrogen collected at 300 K temperature and 900 mm Hg pressure. The percentage composition of nitrogen in the compound is ​ %…2025 · 4 Apr · Shift 1 · Q22 · Numerical
  5. A toxic compound " A " when reacted with NaCN in aqueous acidic medium yields an edible cooking component and food preservative " B ". " B " is converted to " C " by diborane and can be used as an additive to petrol to reduce emission. "C"…2025 · 4 Apr · Shift 2 · Q11 · MCQ
  6. Match List - I with List - II Choose the correct answer from the options given below : Includes table2025 · 4 Apr · Shift 2 · Q3 · MCQ
  7. In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas (N2​) at 300 K temperature and 715 mm Hg pressure. The percentage composition of ' N ' in the organic compound is…2025 · 7 Apr · Shift 2 · Q21 · Numerical
  8. A mixture of 1 g each of chlorobenzene, aniline, and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel. 5 M NaOH (30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside.…2025 · 7 Apr · Shift 2 · Q7 · MCQ
  9. Given below are two statements: Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds. Statement II: The sodium fusion extract of an organic compound having N and S gives prussian blue colour…2025 · 23 Jan · Shift 1 · Q1 · MCQ
  10. In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide ( AgBr ). The percentage of Bromine in the organic compound is ​×10−1%(Nearest integer). (Given :…2025 · 24 Jan · Shift 2 · Q23 · Numerical
  11. In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is ​×10−1%. (Molar mass : O=16, S=32,Ba=137…2025 · 29 Jan · Shift 2 · Q23 · Numerical
  12. In Kjeldahl's method for estimation of nitrogen, CuSO4​ acts as :2024 · 1 Feb · Shift 1 · Q5 · MCQ
  13. Given below are two statements : Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution. Statement (II) : In this titration phenolphthalein can be used as indicator. In the light…2024 · 1 Feb · Shift 1 · Q6 · MCQ
  14. Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of 2M H2​SO4​. The percentage of nitrogen in the compound is ​%.2024 · 1 Feb · Shift 2 · Q27 · Numerical
  15. Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol…2024 · 6 Apr · Shift 1 · Q13 · MCQ
  16. The correct statement among the following, for a "chromatography" purification method is :2024 · 6 Apr · Shift 2 · Q7 · MCQ
  17. Match List I with List II Choose the correct answer from the options given below : Includes table2024 · 8 Apr · Shift 2 · Q16 · MCQ
  18. Identify the incorrect statements regarding primary standard of titrimetric analysis. (A) It should be purely available in dry form. (B) It should not undergo chemical change in air. (C) It should be hygroscopic and should react with…2024 · 9 Apr · Shift 1 · Q7 · MCQ
  19. Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 9 Apr · Shift 2 · Q16 · MCQ
  20. In the given TLC, the distance of spot A & B are 5 cm & 7 cm, from the bottom of TLC plate, respectively. Rf​ value of B is x×10−1 times more than A. The value of x is ​… Includes diagram2024 · 9 Apr · Shift 2 · Q22 · Numerical
  21. Which of the following compound can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite.2024 · 9 Apr · Shift 2 · Q5 · MCQ
  22. The technique used for purification of steam volatile water immiscible substances is :2024 · 27 Jan · Shift 2 · Q5 · MCQ
  23. In chromyl chloride test for confirmation of Cl− ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and 10% H2​O2​ turns organic layer blue indicating…2024 · 29 Jan · Shift 1 · Q8 · MCQ
  24. Chromatographic technique/s based on the principle of differential adsorption is / are A. Column chromatography B. Thin layer chromatography C. Paper chromatography Choose the most appropriate answer from the options given below:2024 · 29 Jan · Shift 2 · Q12 · MCQ
  25. On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation factor of the organic compound is ​×10−1.2024 · 30 Jan · Shift 1 · Q29 · Numerical
  26. Match List I with List II Choose the correct answer from the options given below: Includes table2024 · 31 Jan · Shift 1 · Q16 · MCQ
  27. The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable…2024 · 31 Jan · Shift 2 · Q16 · MCQ
  28. Given below are two statements : Statement I : Sulphanilic acid gives esterification test for carboxyl group. Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection. In the light of the above…2023 · 1 Feb · Shift 2 · Q5 · MCQ
  29. Match List I with List II Choose the correct answer from the options given below: Includes table2023 · 6 Apr · Shift 1 · Q13 · MCQ
  30. Given below are two statements: Statement I : Methyl orange is a weak acid. Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form. In the light of the above statement, choose the most…2023 · 8 Apr · Shift 2 · Q13 · MCQ
  31. A compound 'X' when treated with phthalic anhydride in presence of concentrated H2​SO4​ yields 'Y'. 'Y' is used as an acid/base indicator. 'X' and 'Y' are…2023 · 8 Apr · Shift 2 · Q4 · MCQ
  32. Given below are two statements: Statement I : Aqueous solution of K 2​ Cr 2​ O 7​ is preferred as a primary standard in volumetric analysis over Na 2​ Cr 2​ O 7​ aqueous solution. Statement II : K 2​ Cr 2​ O 7​ has a…2023 · 10 Apr · Shift 1 · Q11 · MCQ
  33. In Carius tube, an organic compound 'X' is treated with sodium peroxide to form a mineral acid 'Y'. The solution of BaCl2​ is added to 'Y' to form a precipitate 'Z'. 'Z' is used for the quantitative…2023 · 10 Apr · Shift 2 · Q10 · MCQ
  34. KMnO4​ is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute H2​SO4​. Number of water molecules produced for 2 molecules of KMnO4​ is ​.2023 · 13 Apr · Shift 1 · Q14 · Numerical
  35. 0.400 g of an organic compound (X) gave 0.376 g of AgBr in Carius method for estimation of bromine. % of bromine in the compound (X) is ​. (Given: Molar…2023 · 13 Apr · Shift 2 · Q14 · Numerical
  36. Compound that will give positive Lassaigne's test for both nitrogen and halogen is :2023 · 29 Jan · Shift 1 · Q3 · MCQ
  37. In Dumas method for the estimation of N2​, the sample is heated with copper oxide and the gas evolved is passed over :2023 · 31 Jan · Shift 2 · Q8 · MCQ
  38. 0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N2​ evolved (at STP) was found to be 22.400 mL. The percentage of nitrogen in the compound is ​. [nearest…2022 · 24 Jun · Shift 2 · Q19 · Numerical
  39. While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the compound neutralized 2.5 mL of 2MH2​SO4​. The…2022 · 25 Jul · Shift 1 · Q18 · Numerical
  40. In base vs. acid titration, at the end point methyl orange is present as2022 · 25 Jul · Shift 2 · Q13 · MCQ
  41. Given below are two statements : Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed. Statement II : If both nitrogen and sulphur are present in an organic…2022 · 26 Jun · Shift 1 · Q6 · MCQ
  42. In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is ​×10−2 g. (Nearest integer) Includes diagram2022 · 27 Jul · Shift 2 · Q21 · Numerical
  43. 0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is ​. [in nearest integer] (Given : Molar mass of Ag is 108…2022 · 27 Jun · Shift 2 · Q22 · Numerical
  44. A sample of 0.125 g of an organic compound when analyzed by Duma's method yields 22.78 mL of nitrogen gas collected over KOH solution at 280 K and 759 mmHg. The…2022 · 28 Jul · Shift 2 · Q18 · Numerical
  45. The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is :2022 · 28 Jun · Shift 1 · Q13 · MCQ
  46. A 2.0 g sample containing MnO2​ is treated with HCl liberating Cl2​. The Cl2​ gas is passed into a solution of KI and 60.0 mL of 0.1 M Na2​S2​O3​ is required to titrate the liberated iodine. The percentage of MnO2​ in the…2022 · 28 Jun · Shift 1 · Q14 · Numerical
  47. In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is ​ % (nearest integer) (Relative atomic masses of Ag and Br are 108u and…2022 · 28 Jun · Shift 1 · Q23 · Numerical
  48. In bromination of Propyne, with Bromine, 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2-tetrabromopropane obtained from 1 g of Bromine in this reaction is ​× 10 − 1 g.…2022 · 29 Jul · Shift 1 · Q23 · Numerical
  49. Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound neutralised 12.5 mL of 1 M H2​SO4​ solution. The percentage of nitrogen in the compound is ​…2022 · 29 Jun · Shift 1 · Q17 · Numerical
  50. The reagent neutral ferric chloride is used to detect the presence of ​2022 · 30 Jun · Shift 1 · Q14 · MCQ
  51. An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is ​× 10 − 1 g. (Given molar mass of barium sulphate 233 g mol − 1)…2022 · 30 Jun · Shift 1 · Q21 · Numerical
  52. Match List - I with List - II : The correct match is : Includes table2021 · 16 Mar · Shift 2 · Q1 · MCQ
  53. In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg pressure. The percentage composition of nitrogen in the compound is ​. (Round…2021 · 16 Mar · Shift 2 · Q20 · Numerical
  54. In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is ​%. (Round off to the Nearest Integer). (Given atomic mass : C : 12.0… Includes diagram2021 · 17 Mar · Shift 1 · Q17 · Numerical
  55. Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of2021 · 18 Mar · Shift 1 · Q4 · MCQ
  56. An inorganic Compound 'X' on treatment with concentrated H2​SO4​ produces brown fumes and gives dark brown ring with FeSO4​ in presence of concentrated H2​SO4​. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl…2021 · 20 Jul · Shift 1 · Q5 · MCQ
  57. In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :2021 · 20 Jul · Shift 2 · Q15 · MCQ
  58. Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene ​. (Nearest integer)2021 · 22 Jul · Shift 2 · Q16 · Numerical
  59. Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?2021 · 25 Feb · Shift 2 · Q12 · MCQ
  60. Consider titration of NaOH solution versus 1.25 M oxalic acid solution. At the end point following burette readings were obtained. (i) 4.5 mL (ii) 4.5 mL (iii) 4.4 mL (iv) 4.4 mL (v) 4.4 mL If the volume of oxalic acid taken was 10.0 mL…2021 · 25 Feb · Shift 2 · Q19 · Numerical
  61. 0.8 g of an organic compound was analyzed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be 42%, then ​ mL of 1 M H2​SO4​ would have been…2021 · 25 Jul · Shift 2 · Q22 · Numerical
  62. Which one of the following complexes is violet in colour?2021 · 26 Aug · Shift 1 · Q1 · MCQ
  63. In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in the compound is ​%. (Nearest integer) (Atomic Mass of Ba = 137 u)2021 · 26 Aug · Shift 2 · Q13 · Numerical
  64. Which of the following is 'a' FALSE statement ?2021 · 26 Feb · Shift 1 · Q2 · MCQ
  65. Seliwanoff test and Xanthoproteic test are used for the identification of ​ and ​ respectively.2021 · 26 Feb · Shift 2 · Q16 · MCQ
  66. The number of moles of CuO, that will be utilized in Dumas method for estimation nitrogen in a sample of 57.5 g of N, N-dimethylaminopentane is ​× 10 − 2. (Nearest integer)2021 · 27 Aug · Shift 1 · Q18 · Numerical
  67. When 10 mL of an aqueous solution of KMnO4​ was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of KMnO4​ in grams per litre is ​×…2021 · 27 Aug · Shift 1 · Q22 · Numerical
  68. Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is :2021 · 27 Aug · Shift 1 · Q7 · MCQ
  69. Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?2021 · 27 Aug · Shift 2 · Q10 · MCQ
  70. An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted with AgNO3​ [Carius Method], the percentage of chlorine in compound A is ​ when it…2021 · 27 Jul · Shift 1 · Q17 · Numerical
  71. The transformation occurring in Duma's method is given below : C2​H7​N+(2x+2y​)CuO→xCO2​+2y​H2​O+2z​N2​+(2x+2y​)Cu The value of y is ​…2021 · 31 Aug · Shift 2 · Q21 · Numerical
  72. In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?2020 · 2 Sep · Shift 1 · Q19 · MCQ
  73. If you spill a chemical toilet cleaning liquid on your hand, your first aid would be2020 · 2 Sep · Shift 2 · Q17 · MCQ
  74. In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is ​. (Atomic mass, Ag = 108, Br = 80 g mol–1)2020 · 6 Sep · Shift 1 · Q4 · Numerical
  75. A, B and C are three biomolecules. The results of the tests performed on them are given below:  A  B  C ​ Molisch’s  Test ​ Positive  Positive  Negative ​ Barfoed  Test ​ Negative  Positive  Negative ​ Biuret  Test ​ Negative  Negative  Positive ​​…2020 · 9 Jan · Shift 2 · Q4 · MCQ
  76. An organic compound neither reacts with neutral ferric chloride solution nor with fehling solution. it however, reacts with Grignard reagent and gives positive iodoform test. The compound is :2019 · 8 Apr · Shift 1 · Q1 · MCQ
  77. An organic compound 'X' showing the following solubility profile is : Includes diagram2019 · 8 Apr · Shift 1 · Q4 · MCQ
  78. The organic compound that gives following qualitative analysis is : Includes table2019 · 9 Apr · Shift 1 · Q14 · MCQ
  79. The correct match between Item-I and Item-II is : Includes table2019 · 9 Jan · Shift 1 · Q2 · MCQ
  80. The tests performed on compound X and their inferences are : Compound 'X' is : Includes table2019 · 9 Jan · Shift 2 · Q3 · MCQ
  81. The correct match between item 'I' and item 'II' is : Includes table2019 · 10 Jan · Shift 2 · Q13 · MCQ
  82. An organic compound 'A' is oxidizod with Na2​O2​ followed by boiling with HNO3​. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on above observation, the element present in the given…2019 · 12 Apr · Shift 1 · Q16 · MCQ
  83. In a complexometric titration of metal ion with ligand M(Metal ion) + L(Ligand) → C(Complex) end point is estimated spectrophoto - metrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs, then the…2018 · 16 Apr · Shift 1 · Q1 · MCQ
  84. For standardizing NaOH solution, which of the following is used as a primary standard ?2018 · 16 Apr · Shift 1 · Q16 · MCQ
  85. Which of the following compounds will be suitable for Kjeldahl’s method for nitrogen estimation?2018 · Shift 0 · Q10 · MCQ
  86. Sodium salt of an organic acid ‘X’ produces effervescence with conc. H2​SO4​. ‘X’ reacts with the acidified aqueous CaCl2​ solution to give a white precipitate which decolourises acidic solution of KMnO4​. ‘X’ is :2017 · Shift 0 · Q4 · MCQ
  87. Sodium extract is heated with concentrated HNO3​ before testing for halogens because :2016 · 10 Apr · Shift 1 · Q8 · MCQ
  88. Which of the following reagents may be used to distinguish between phenol and benzoic acid ?2011 · Shift 0 · Q15 · MCQ
  89. 29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl’s method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete…2010 · Shift 0 · Q17 · MCQ
  90. The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is2004 · Shift 0 · Q21 · MCQ