Practice Questions

Q58.The specific conductance of 0 . 0025M acetic acid is 5 × 10-5 S cm-1 at a certain temperature. The dissociation constant of acetic acid is ___________ × 10-7.(Nearest integer) Consider limiting molar conductivity of CH3COOH as 400 S cm2 mol-1

Q58.Match List-I and List-II. List-I List-II A. Elastomeric polymer I. Urea formaldehyde resin B. Fibre polymer II. Polystyrene C. Thermosetting polymer III. Polyester D. Thermoplastic polymer IV. Neoprene Choose the correct answer from the options given below: (1) A-II, B-III, C-I, D-IV (2) A-II, B-I, C-IV, D-III (3) A-IV, B-III, C-I, D-II (4) A-IV, B-I, C-III, D-II

Q58.Number of compounds from the following which will not dissolve in cold NaHCO3 and NaOH solutions but will dissolve in hot NaOH solution is _____ . JEE Main 2023 (30 Jan Shift 2) JEE Main Previous Year Paper

Q58.Major product ′P′ formed in the following reaction is Major product JEE Main 2023 (08 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.KClO3 + 6FeSO4 + 3H2SO4 → KCl + 3Fe2 ( SO4 ) + 3H2O 3 The above reaction was studied at 300 K by monitoring the concentration of FeSO4 in which initial concentration was 10 M and after half an hour became 8 . 8 M. The rate of production of Fe2 ( SO4 ) is 3 _______ × l0 – 6 mol L – 1 s – 1 (Nearest integer)

Q58.The major product ‘ P’ formed in the following sequence of reactions is JEE Main 2023 (12 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.Among the following, the number of tranquilizer/s is/are A. Chloroliazepoxide B. Veronal C. Valium D. Salvarsan

Q58.Match List I with List II : s reacted with reagents in List I to form products in List II products in List II. List I (Reagent) List II (Product) A. I. B. HBF4,Δ II. C. Cu, HCl III. D. CuCN/KCN IV. Choose the correct answer from the options given below: (1) A-IV, B-III, C-II, D-I (2) A-III, B-I, C-II, D-IV (3) A-I, B-III, C-IV, D-II (4) A-III, B-I, C-IV, D-II

Q58.For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol – 1 and for the adsorption of hydrogen on nickel, the activation energy is 41 . 4 kJ mol – 1 . The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at 300 K is _______ (Nearest integer) Given: In10 = 2 . 3 R = 8 . 3 J K-1 mol-1

Q58.The major product ' P' for the following sequence of reactions is: (1) (2) (3) (4)

Q58.If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0 . 3, then the observed freezing point will be _____ % higher than the expected/theoretical freezing point. (Nearest integer).

Q58.In Chromyl chloride, the oxidation state of chromium is (+) ___________.

Q58. i) HCN−D −(+)−Glyceraldehyde → ii)H2O/H+ iii) HNO3 The products formed in the above reaction are (1) One optically active and one meso product (2) Two optically inactive products (3) Two optically active products (4) One optically inactive and one meso product Q59. ′A′ is (1) (2) (3) (4)

Q58.A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If the initial concentration of B is 4 times that of A and they both start decaying at the same time, how much time will it take for the concentration of both of them to be same? ________min.

Q58.A →B The rate constants of the above reaction at 200 K and 300 K are 0 . 03 min-1 and 0 . 05 min-1 respectively. The activation energy for the reaction is J (Nearest integer) (Given : In 10 = 2 . 3 R = 8 . 3 J K-1 mol-1 log 5 = 0 . 70 log 3 = 0 . 48 log2 = 0 . 30

Q58.Sea water contains 29 . 25 % NaCl and 19 % MgCl2 by weight of solution. The normal boiling point of the sea water is ∘C (Nearest integer) Assume 100% ionization for both NaCl and MgCl2 Given: KbH2O = 0 . 52 K kg mol-1 Molar mass of NaCl and MgCl2 is 58 . 5 and 95 g mol-1 respectively.

Q58.The variation of the rate of an enzyme catalyzed reaction with substrate concentration is correctly represented by graph JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (a) (b) (c) JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (d) (1) b (2) c (3) d (4) a

Q58.The number of correct statement/s from the following is _____ . A.Larger the activation energy, smaller is the value of the rate constant. B. The higher is the activation energy, higher is the value of the temperature coefficient. C. At lower temperatures, increase in temperature causes more change in the value of k than at higher temperature. D. A plot of ln k vs 1 is a straight line with slope equal to -Ea T R

Q58.Which of the following compounds are not used as disinfectants? A. Chloroxylenol B. Bithional C. Veronal D. Prontosil E. Terpineol Choose the correct answer from the options given below: (1) A, B, E (2) C, D (3) A, B (4) B, D, E

Q58.Given below are two statements: Statement I: Morphine is a narcotic analgesic. It helps in relieving pain without producing sleep. Statement II: Morphine and its derivatives are obtained from opium poppy. In the light of the above statements, choose the correct answer from the options given below (1) Both Statement I and Statement II are true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are false (4) Statement I is false but Statement II is true

Q58.Correct statement is : (1) An average human being consumes more food (2) An average human being consumes nearly 15 than air times more air than food (3) An average human being consumes equal amount (4) An average human being consumes 100 times of food and air more air than food

Q59.Match List I with List II List I List II Antimicrobials Names (A) Narrow Spectrum (I) Furacin Antibiotic (B) Antiseptic (II) Sulphur dioxide (C) Disinfectants (III) Penicillin-G (D) Broad spectrum antibiotic (IV) Chloramphenicol (1) (A) - III, (B) - I, (C) - II, (D) - IV (2) (A) - I, (B) - II, (C) - IV, (D) - III (3) (A) - II, (B) - I, (C) - IV, (D) - III (4) (A) - III, (B) - I, (C) - IV, (D) - II JEE Main 2023 (29 Jan Shift 1) JEE Main Previous Year Paper

Q59.Match List I with List II : List I List II A. Saccharin I. High potency sweetener B. Aspartame II. First artificial sweetening agent C Alitame III. Stable at cooking temperature D. Sucralose IV. Unstable at cooking temperature Choose the correct answer from the options given below : JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper (1) A-IV, B-III, C-I, D-II (2) A-II, B-III, C-IV, D-I (3) A-II, B-IV, C-III, D-I (4) A-II, B-IV, C-I, D-III

Q59.Compoun ′B′ is (1) (2) (3) (4)

Q59.Match List I with List II List I (Name of polymer) List II (Uses) A Glyptal I Flexible pipes B Neoprene II Synthetic wool C Acrilan III Paints and Lacquers D LDP IV Gaskets Choose the correct answer from the options given below :- (1) A −III, B −II, C −IV, D −I (2) A −III, B −IV, C −II, D −I (3) A −III, B −IV, C −I, D −II (4) A −III, B −I, C −IV, D −II