Practice Questions

Q45.The correct sequence of ligands in the order of decreasing field strength is : (1) NCS−> EDTA4−> CN−> CO (2) CO > H2O > F−> S2− (3) S2−> −OH > EDTA4−> CO (4) −OH > F−> NH3 > CN−

Q45. This reduction reaction is known as: (1) Rosenmund reduction (2) Wolff-Kishner reduction (3) Stephen reduction (4) Etard reduction

Q46.The correct order of ligands arranged in increasing field strength. (1) F−< Br−< I−< NH3 (2) Br−< F−< H2O < NH3 (3) H2O < −OH < CN−< NH3 (4) Cl−< −OH < Br−< CN−

Q47.Identify the name reaction. (1) Stephen reaction (2) Etard reaction (3) Gatterman-koch reaction (4) Rosenmund reduction

Q47.Which one the following compounds will readily react with dilute NaOH ? (1) C2H5OH (2) C6H5OH (3) C6H5CH2OH (4) (CH3)3COH

Q47.Phenolic group can be identified by a positive: (1) Phthalein dye test (2) Lucas test (3) Tollen’s test (4) Carbylamine test

Q48.On passing a gas, ' X ', through Nessler's reagent, a brown precipitate is obtained. The gas ' X ' is (1) H2S (2) CO2 (3) NH3 (4) Cl2

Q48.Match List – I with List –II. JEE Main 2024 (01 Feb Shift 1) JEE Main Previous Year Paper Choose the correct answer from options given below: (1) A - III, B - IV, C - I, D - II (2) A - IV, B - II, C - I, D - III (3) A - IV, B - II, C - III, D - I (4) A - III, B - IV, C - II, D - I

Q48. Identify the product in the following reaction : (1) (2) (3) (4)

Q48.The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ; (1) Retention occurs in SNl reaction and inversion (2) Racemisation occurs in SNl reaction and occurs in SN2 reaction. retention occurs in SN2 reaction. (3) Racemisation occurs in both SN1 and SN2 (4) Racemisation occurs in SN1 reaction and reactions. inversion occurs in SN2 reaction.

Q49.A reagent which gives brilliant red precipitate with Nickel ions in basic medium is (1) sodium nitroprusside (2) neutral FeCl3 (3) meta-dinitrobenzene (4) dimethyl glyoxime

Q49. Acid D formed in above reaction is: (1) Gluconic acid (2) Succinic acid (3) Oxalic acid (4) Malonic acid

Q49.Type of amino acids obtained by hydrolysis of proteins is : (1) β (2) α (3) δ (4) γ

Q49. Match List - I with List - II. Choose the correct answer from the options given below : (1) (A)-(IV), (B)-(II), (C)-(III), (D)-(I) (2) (A)-(I), (B)-(IV), (C)-(II), (D)-(III) (3) (A)-(III), (B)-(II), (C)-(I), (D)-(IV) (4) (A)-(II), (B)-(IV), (C)-(I), (D)-(III)

Q50.Which of the following gives a positive test with ninhydrin? (1) Starch (2) Egg albumin (3) Polyvinyl chloride (4) Cellulose Q51. 9.3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product ' P '. The mass of product ' P ' obtaind is 26.4 g. The percentage yield is _______ % .

Q50.Sugar which does not give reddish brown precipitate with Fehling's reagent is: JEE Main 2024 (30 Jan Shift 1) JEE Main Previous Year Paper (1) Sucrose (2) Lactose (3) Glucose (4) Maltose Q51. 0. 05 cm thick coating of silver is deposited on a plate of 0. 05 m2 area. The number of silver atoms deposited on plate are _______ ×1023 . (At mass Ag = 108, d = 7. 9 g cm−3) Round off to the nearest integer.

Q50.If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is: (1) CATTAGCT (2) TACGAAGT (3) GTACTTAC (4) ATGCGACT

Q50. The incorrect statements regarding enzymes are : (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse different kinds of reactions. (C) Most Enzymes are globular proteins. (D) Enzyme - oxidase catalyses the hydrolysis of maltose into glucose. Choose the correct answer from the option given below : (1) (B), (C) and (D) (2) (B) and (D) (3) (A), (B) and (C) (4) (B) and (C)

Q50.Coagulation of egg, on heating is because of : JEE Main 2024 (05 Apr Shift 2) JEE Main Previous Year Paper (1) The secondary structure of protein remains (2) Denaturation of protein occurs unchanged (3) Biological property of protein remains unchanged(4) Breaking of the peptide linkage in the primary structure of protein occurs

Q50.Two nucleotides are joined together by a linkage known as : (1) Phosphodiester linkage (2) Glycosidic linkage (3) Disulphide linkage (4) Peptide linkage

Q63.The 20th term from the end of the progression 20, 191 181 173 … , - 1291 is :- 4, 2, 4, 4 (1) -118 (2) -110 (3) -115 (4) -100

Q63.If A denotes the sum of all the coefficients in the expansion of (1 −3x + 10x2) and B denotes the sum of all the coefficients in the expansion of (1 + x2)n , then : (1) A = B3 (2) 3 A = B (3) B = A3 (4) A = 3 B

Q63.The number of ways in which 21 identical apples can be distributed among three children such that each child gets at least 2 apples, is (1) 406 (2) 130 (3) 142 (4) 136

Q64.A line passing through the point A(9, 0) makes an angle of 30° with the positive direction of x-axis. If this line is rotated about A through an angle of 15° in the clockwise direction, then its equation in the new position is (1) y + x = 9 (2) x + y = 9 √3−2 √3−2 (3) x + y = 9 (4) y + x = 9 √3+2 √3+2

Q64.If sin x = −35 , where π < x < 3π2 , then 80 (tan2 x −cos x) is equal to (1) 108 (2) 109 (3) 18 (4) 19 JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper