Practice Questions

Q53.At constant temperature, a gas is at a pressure of 940 . 3 mm Hg. The pressure at which its volume decreases by 40% is ______ mm Hg. (Nearest integer) +2 . 2 V +0 . 70 V -0 . 45 V 2 - ⟶ Fe3 + ⟶ Fe2 + ⟶ Fe0

Q54.In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is: (1) Chloral (2) Gammaxene (3) Chloropicrin (4) Freon- 12

Q54.See the following chemical reaction: Cr2O72 - + XH+ + 6Fe2 + →YCr3 + + 6Fe3 + + ZH2O The sum of X, Y and Z is

Q55.When Fe0 . 93O is heated in presence of oxygen, it converts to Fe2O3. The number of correct statement/s from the following is ______ . A. The equivalent weight of Fe0 . 93O is Molecular0 . 79weight B. The number of moles of Fe2 + and Fe3 + in 1 mole of Fe0 . 93O is 0 . 79 and 0 . 14 respectively. C. Fe0 . 93O is metal deficient with lattice comprising of cubic closed packed arrangement of O2 - ions. D. The % composition of Fe2 + and Fe3 + in Fe0 . 93O is 85% and 15% respectively. Q56.5 g of NaOH was dissolved in deionized water to prepare a 450 mL stock solution. What volume (in mL) of this solution would be required to prepare 500 mL of 0 . 1 M solution ? Given : Molar Mass of Na, O and H is 23, 16 and 1 g mol – 1 respectively

Q55.The sum of oxidation state of the metals in Fe(CO)5 , VO2+ and WO3 is

Q56.In alkaline medium, the reduction of permanganate anion involves a gain of ____________ electrons.

Q56.Decreasing order towards SN1 reaction for the following compounds is: (1) a > c > d > b (2) a > b > c > d (3) b > d > c > a (4) d > b > c > a

Q57.Choose the correct colour of the product for the following reaction. (1) Yellow (2) White (3) Red (4) Blue

Q57.In the following reaction, the total number of oxygen atoms in 𝑋 and 𝑌 is______ Na2O + H2O →2X Cl2O7 + H2O →2Y

Q57.Which of the following statements is incorrect for antibiotics? (1) An antibiotic must be a product of metabolism. (2) An antibiotic is a synthetic substance produced as a structural analogue of naturally occurring antibiotic. (3) An antibiotic should promote the growth or (4) An antibiotic should be effective in low survival of microorganisms. concentrations.

Q57.Reaction of propanamide with Br2 / KOH (aq) produces: (1) Ethylnitrile (2) Propylamine (3) Propanenitrile (4) Ethylamine

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

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

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.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

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.The oxidation sate of phosphorus in hypophosphoric acid is

Q59.Sum of oxidation states of bromine in bromic acid and perbromic acid is JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper

Q59.A doctor prescribed the drug Equanil to a patient. The patient was likely to have symptoms of which disease? (1) Stomach ulcers (2) Hyperacidity (3) Anxiety and stress (4) Depression and hypertension

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 (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

Q60.Match List I with List II List II List I One Letter Natural amino acid Code (A) Glutamic acid (I) Q (B) Glutamine (II) W (C) Tyrosine (III) E JEE Main 2023 (08 Apr Shift 2) JEE Main Previous Year Paper (D) Tryptophan (IV) Y Choose the correct answer from the options given below: (1) (A)-III, B-IV, (C)-I, (D)-II (2) (A)-IV, B-III, (C)-I, (D)-II (3) (A)-III, B-I, (C)-IV, (D)-II (4) (A)-II, B-I, (C)-IV, (D)-III

Q60.A ( g ) →2 B ( g ) + C ( g ) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which increased to 1600 mm Hg after 10 min. The total pressure of the system after 30 min will be mm Hg. (Nearest integer)

Q60.Match List-I with List-II. List-I List-II Natural Amino One Letter acid Code (A) Arginine (I) D (B) Aspartic acid (II) N (C) Asparagine (III) A (D) Alanine (IV) R Choose the correct answer from the options given below: JEE Main 2023 (06 Apr Shift 2) JEE Main Previous Year Paper (1) (A)–IV, B–I, (C)–II, (D)–III (2) (A)–I, B–III, (C)–IV, (D)–II (3) (A)–III, B–I, (C)–II, (D)–IV (4) (A)–IV, B–I, (C)–III, (D)–II