Qualitative Analysis PYQs Set 2 (PDF)

Set 2 of 2 · Questions 31-37 of 37

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Qualitative Analysis · Set 2 (Q31-37)
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31. $A mixture of 1 g each of chlorobenzene, aniline, and benzoic acid is dissolved in 50 mL ethyl acetate and placed in a separating funnel. 5 M NaOH (30 mL) was added in the same funnel. The funnel was shaken vigorously and then kept aside. The ethyl acetate layer in the funnel contains:$ (1) $chlorobenzene and aniline$ (2) $benzoic acid and aniline$ (3) $benzoic acid$ (4) $benzoic acid and chlorobenzene$ 32. $Formulae for Nessler's reagent is:$ (1) $K H g_{2} I_{2}$ (2) $K H g I_{3}$ (3) $K_{2} H g I_{4}$ (4) $H g I_{2}$ 33. $How can photochemical smog be controlled?$ (1) $By using tall chimneys$ (2) $By complete combustion of fuel$ (3) $By using catalytic converters in the automobiles/industry$ (4) $By using catalyst$ 34. $Which of the following is true about freons ?$ (1) $These are chlorofluorocarbon compounds$ (2) $These are chemicals causing skin cancer$ (3) $These are radicals of chlorine and chlorine monoxide$ (4) $All radicals are called freons$ 35. $Formation of photochemical smog involves the following reaction in which A, B and C are respectively. (i) N O_{2} A + B (ii) B + O_{2} \to C (iii) A + C \to N O_{2} + O_{2} Choose the correct answer from the options given below:$ (1) $O,NO& N O_{3}^{-}$ (2) $O, N_{2} O&NO$ (3) $N, O_{2} & O_{3}$ (4) $NO,O& O_{3}$ 36. $Correct statement is :$ (1) $An average human being consumes more food than air$ (2) $An average human being consumes nearly 15 times more air than food$ (3) $An average human being consumes equal amount of food and air$ (4) $An average human being consumes 100 times more air than food$ 37. $Identify A, B and C in the given reaction sequence: A H N O_{3} P b (N O_{3})_{2} H_{2} S O_{4} B (a) ammonium acetate, (b) acetic acid, (c) K_{2} C r O_{4} C$ (1) $P b C l_{2}, P b S O_{4}, P b C r O_{4}$ (2) $P b S, P b S O_{4}, P b (C H_{3} C O O)_{2}$ (3) $P b C l_{2}, P b (S O_{4})_{2}, P b C r O_{4}$ (4) $P b S, P b S O_{4}, P b C r O_{4}$