Exams › JEE Advanced › Chemistry
Match the following chemical tests in List-I with the functional groups or compounds they identify in List-II. List-I: (A) Baeyer test, (B) Ceric ammonium nitrate test, (C) Tollen's dye test (phthalein dye test), (D) Schiff test List-II: (I) Phenol, (II) Aldehyde, (III) Alcoholic -OH group, (IV) Unsaturation Choose the correct matching:
- (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
- (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
Correct answer: (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
Solution
Baeyer test: alkaline KMnO4 is decolourised by unsaturated compounds (alkenes/alkynes) -> identifies unsaturation (IV). Ceric ammonium nitrate test: gives red colour with alcoholic -OH groups -> identifies alcoholic OH (III). Phthalein dye test (thalen dye test): used to identify phenols -> (I). Schiff test: Schiff's reagent (fuchsin-SO2) turns pink/magenta with aldehydes -> identifies aldehyde (II). Matching: A-IV, B-III, C-I, D-II.
Related JEE Advanced Chemistry questions
- Three carbon acids are listed with their pKa values: (I) Triphenylmethane (Ph3CH), pKa = 33.3 (II) Benzene (C6H6), pKa = 43 (III) Methane (CH4), pKa = 50 Arrange them in increasing order of acidity (least acidic first).
- From the following compounds, how many will produce effervescence (release CO2 gas) when treated with aqueous NaHCO3 solution? (i) 2-methylbenzoic acid (o-toluic acid) (ii) cyclohexylsulfonic acid (iii) 4-aminobenzaldehyde (iv) 4-hydroxycyclohexanone (v) cyclobutane-1,2,3,4-tetraol
- Which of the following correctly represents the order of acid strength for the given substituted benzoic acids?
- How many carbon atoms are present in the first (simplest) member of the homologous series of esters?
- In the Dumas method for nitrogen estimation, 0.30 g of an organic compound liberated 82.1 mL of nitrogen gas collected over water at 300 K and 775 mm Hg total pressure. Given that the aqueous tension (vapour pressure of water) at 300 K is 15 mm Hg, calculate the percentage of nitrogen in the compound.
- 0.8 g of an organic compound is analysed for nitrogen by Kjeldahl's method. If the nitrogen content is found to be 42%, how many mL of (M/2) H2SO4 are neutralized by the ammonia liberated? (N = 14)
⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →