Practice Questions

Q45.Which of the following is Lindlar catalyst? JEE Main 2021 (16 Mar Shift 1) JEE Main Previous Year Paper (1) Zinc chloride and HCl (2) Cold dilute solution of KMnO4 (3) Sodium and Liquid NH3 (4) Partially deactivated palladised charcoal

Q46.Which one of the following compounds will give orange precipitate when treated with 2, 4 −dinitrophenyl hydrazine ? (1) (2) (3) (4)

Q47. R −CN (i) DIBAL−H ⟶R −Y Consider the above reaction and identify "Y" (ii)H2O (1) −CH2 NH2 (2) −CONH2 (3) − CHO (4) −COOH

Q47.Primary, secondary and tertiary amines can be separated using: (1) Para-Toluene sulphonyl chloride (2) Chloroform and KOH (3) Benzene sulphonic acid (4) Acetyl amide

Q48.The major product of the following chemical reaction is : (1) CH3 CH2 CHO (2) CH3 CH2 CH2 OH (3) CH3 CH2 CH3 (4) (CH3 CH2 CO)2O

Q48.Which of the following reaction is an example of ammonolysis? (1) C6H5COCl + C6H5 NH2 ⟶C6H5 CONHC6 H5(2) [H] C6H5 CH2 CN →C6H5 CH2 CH2 NH2 (3) HCl (4) C6H5 CH2 Cl + NH3 ⟶C6H5 CH2 NH2−C6H5 NH2 → C6H5 NH3 Cl−

Q48.Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain? (1) (2) (3) (4)

Q48.Orlon fibres are made up of: (1) Polyacrylonitrile (2) Polyesters (3) Polyamide (4) Cellulose

Q48.Match List-I with List-II : List-I Chemical Compound List-II Used as a Sucralose i Synthetic detergent b Glyceryl ester of stearic acid ii Artificial sweetener c Sodium benzoate iii Antiseptic d Bithional iv Food preservative Choose the correct match : JEE Main 2021 (17 Mar Shift 2) JEE Main Previous Year Paper (1) (a) −(iv), (b) −(iii), (c) −(ii), (d) −(i) (2) (a) −(ii), (b) −(i), (c) −(iv), (d) −(iii) (3) (a )-( iii ), ( b )-( ii ), (c) −(iv), (d) −(i) (4) (a) −(i), (b) −(ii), (c) −(iv), (d) −(iii)

Q48. is a repeating unit for : (1) Novolac (2) Buna-N (3) Acrilan (4) Neoprene

Q48.Match List I with List II. List I (Monomer Unit) List II (Polymer) (a) Caprolactum (i) Natural rubber (b) 2 - Chloro-1, 3 - butadiene (ii) Buna-N (c) Isoprene (iii) Nylon 6 (d) Acrylonitrile (iv) Neoprene Choose the correct answer from the options given below: (1) a →iii, b →iv, c →i, d →ii (2) a →i, b →ii, c →iii, d →iv (3) a →ii, b →i, c →iv, d →iii (4) a →iv, b →iii, c →ii, d →i JEE Main 2021 (24 Feb Shift 1) JEE Main Previous Year Paper

Q48. List −I List −II (Drug) (Class of Drug) (a) Furacin (i) Antibiotic (b) Arsphenamine (ii) Tranquilizers (c) Dimetone (iii) Antiseptic (d) Valium (iv) Synthetic antihistamines Choose the most appropriate match : (1) (a) −(i), (b) −(iii), (c) −(iv), (d) −(ii) (2) (a) −(iii), (b) −(iv), (c) −(ii), (d) −(i) (3) (a) −(ii), (b) −(i), (c) −(iii), (d) −(iv) (4) (a) −(iii), (b) −(i), (c) −(iv), (d) −(ii)

Q48.Which of the following polymer is used in the manufacture of wood laminates ? (1) cis-poly isoprene (2) Melamine formaldehyde resin (3) Urea formaldehyde resin (4) Phenol and formaldehyde resin

Q49.Fructose is an example of :- (1) Pyranose (2) Ketohexose (3) Aldohexose (4) Heptose

Q49.Match the list −I with list −II List −I List −II (Class of Drug) (Example) (a) Antacid (i) Novestrol (b) Artificial sweetener (ii) Cimetidine (c) Antifertility (iii) Valium (d) Tranquilizers (iv) Alitame (1) a −ii, b −iv, c −i, d −iii (2) a −iv, b −i, c −ii, d −iii (3) a −iv, b −iii, c −i, d −ii (4) a −ii, b −iv, c −iii, d −i

Q49.Which among the following is not a polyester ? (1) Glyptal (2) PHBV (3) Novolac (4) Dacron

Q49.The structure of Neoprene is : (1) (2) (3) (4)

Q49.In polymer Buna- S :′S′ stands for: (1) Strength (2) Sulphur (3) Sulphonation (4) Styrene

Q49.Carbylamine test is used to detect the presence of primary amino group in an organic compound. Which of the following compound is formed when this test is performed with aniline? (1) (2) (3) (4)

Q49.Match List-I with List-II : List - I List - II (a) Chloroprene (i) (b) Neoprene (ii) (c) Acrylonitrile (iii) (d) Isoprene (iv) Choose the correct answer from the options given below: (1) (a) - (iii), (b)-(iv), (c) -(ii), (d) -(i) (2) (a) - (ii), (b)-(iii), (c)-(iv), (d) -(i) (3) (a) - (ii), (b)-(i), (c) -(iv), (d) -(iii) (4) (a) - (iii), (b)-(i), (c) -(iv), (d) -(ii)

Q49. A B C D The correct statement about (A), (B), (C) and (D) is: JEE Main 2021 (27 Aug Shift 1) JEE Main Previous Year Paper (1) (B) and (C) are tranquillizers (2) (B), (C) and (D) are tranquillizers (3) (A) and (D) are tranquillizers (4) (A), (B) and (C) are narcotic analgesics

Q50.The water soluble protein is: (1) Fibrin (2) Albumin (3) Myosin (4) Collagen

Q50.A non-reducing sugar A hydrolyses to give two reducing mono saccharides. Sugar A is (1) Fructose (2) Galactose (3) Glucose (4) Sucrose Q51.______grams of 3−Hydroxy propanal (MW = 74) must be dehydrated to produce 7. 8 g of acrolein (MW = 56)(C3H4O) if the percentage yield is 64. (Round off to the Nearest Integer). [Given: Atomic masses : C : 12. 0u, H : 1. 0u, O : 16. 0u]

Q50.Which one of the following is correct structure for cytosine ? JEE Main 2021 (25 Jul Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q50.The secondary structure of protein is stabilised by: (1) Peptide bond (2) glycosidic bond (3) Hydrogen bonding (4) van der Waals forces