Practice Questions

Q49.Polymer used in orlon is: (1) Polyethene (2) Polycarbonate (3) Polyamide (4) Polyacrylonitrile

Q49.Which of the following metals can be extracted through alkali leaching technique? (1) Sn (2) Pb (3) Au (4) Cu JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper

Q49.In the wet tests for detection of various cations by precipitation, Ba2 + cations are detected by obtaining precipitate of (1) Ba(ox) : Barium oxalate (2) BaCO3 (3) Ba ( OAc ) 2 (4) BaSO4

Q49.Inert gases have positive electron gain enthalpy. Its correct order is (1) Xe < Kr < Ne < He (2) He < Ne < Kr < Xe (3) He < Xe < Kr < Ne (4) He < Kr < Xe < Ne JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper

Q49.Match List-I with List-II. List-I Polymer List-II Type/Class A. Nylon-2-Nylon-6 I. Thermosetting polymer B. Buna-N II. Biodegradable polymer C. Ureaformaldehyde resin III. Synthetic rubber D. Dacron IV. Polyester Choose the correct answer from the options given below: (1) A →IV; B →I; C →II; D →II (2) A →II; B →III; C →I; D →IV (3) A →IV; B →III; C →I; D →II (4) A →II; B →I; C →IV; D →III

Q50.Match List I and List II List I List II Vitamin Deficiency disease A Vitamin A I Beri-Beri B Thiamine II Cheilosis C Ascorbic acid III Xerophthalmia D Riboflavin IV Scurvy Choose the correct answer from the options given below (1) A - III, B - I, C - IV, D - II (2) A - IV, B - I, C - III, D - II (3) A - IV, B - II, C - III, D - I (4) A - III, B - II, C - IV, D - I JEE Main 2023 (06 Apr Shift 1) JEE Main Previous Year Paper

Q50.A solution of CrO5 in amyl alcohol has a....colour (1) Green (2) Orange-Red (3) Yellow (4) Blue

Q50.The naturally occurring amino acid that contains only one basic functional group in its chemical structure is (1) asparagine (2) histidine (3) arginine (4) lysine Q51.1 g of a carbonate M2CO3 on treatment with excess HCl produces 0 . 01 mol of CO2. The molar mass of M2CO3 is gmol-1. (Nearest integer) x is (nearest integer)

Q50.The one that does not stabilize 2∘ and 3∘ structures of proteins is (1) – S – S – linkage (2) H - bonding (3) – O – O – linkage (4) van der Waals forces

Q50.A protein ‘X’ with molecular weight of 70, 000 u, on hydrolysis gives amino acids. One of these amino acid is (1) (2) (3) (4)

Q50.Which is not true for arginine? (1) It has a fairly high melting point (2) It is associated with more than one pKa values. (3) It has high solubility in benzene. (4) It is a crystalline solid.

Q51.Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from (1) +3 to +1 (2) +6 to +3 (3) +2 to +1 (4) +6 to +2

Q51.The IUPAC name of K3[Co(C2O4)3] is: (1) Potassium tris(oxalato)cobaltate (III) (2) Potassium tris(oxalato)cobalt (III) (3) Potassium trioxalatocobalt (III) (4) Potassium trioxalatocobaltate (III)

Q51.In Hall-Heroult process, the following is used for reducing Al2 O3 :- (1) Magnesium (2) Na3 AlF6 (3) Graphite (4) CaF2

Q51.Formulae for Nessler's reagent is: (1) KHg2 I2 (2) KHgI3 (3) K2 HgI4 (4) HgI2

Q53.Which element is not present in Nessler’s reagent? (1) Mercury (2) Potassium (3) Iodine (4) Oxygen

Q53.Element not present in Nessler’s reagent is (1) N (2) Hg (3) I (4) K

Q53.In the cumene to phenol preparation in presence of air, the intermediate is (1) (2) (3) (4)

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

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

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

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