Practice Questions

Q48.Given below are two statements : Statement I : Penicillin is a bacteriostatic type antibiotic. Statement II : The general structure of Penicillin is: Choose the correct option : (1) Both statement I and statement II are false (2) Statement I is incorrect but statement II is true (3) Both statement I and statement II are true (4) Statement I is correct but statement II is false

Q48.Which one of the following reactions does not occur ? (1) (2) (3) (4) JEE Main 2021 (22 Jul Shift 1) JEE Main Previous Year Paper

Q48.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2 O3 with cryolite. Reason (R) : The oxidation state of Al in cryolite is +3. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both (A) and (R) are correct and (R) is the (2) (A) is true but (R) is false. correct explanation of (A). (3) Both (A) and (R) are correct but (R) is not the (4) (A) is false but (R) is true. correct explanation of (A).

Q48. Consider the above chemical reaction and identify product A (1) (2) (3) (4) JEE Main 2021 (18 Mar Shift 1) JEE Main Previous Year Paper

Q48.A reaction of benzonitrile with one equivalent CH3 MgBr followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive ________ (1) Iodoform test (2) Schiff's test (3) Ninhydrin's test (4) Tollen's test

Q48.Which one of the following gives the most stable Diazonium salt ? JEE Main 2021 (01 Sep Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q49.A biodegradable polyamide can be made from: (1) Glycine and isoprene (2) Hexamethylene diamine and adipic acid (3) Glycine and aminocaproic acid (4) Styrene and caproic acid

Q49.Match List- I with List- II. JEE Main 2021 (26 Feb Shift 2) JEE Main Previous Year Paper List- I List- II (a) Sucrose (i) β −D−Galactose and β −D−Glucose (b) Lactose (ii) α −D−Glucose and β −D−Fructose (c) Maltose (iii) α −D−Glucose and α −D−Glucose Choose the correct answer from the options given below: (1) (a) →(iii), (b) →(ii), (c) →(i) (2) (a) →(iii), (b) →(i), (c) →(ii) (3) (a) →(ii), (b) →(i), (c) →(iii) (4) (a) →(i), (b) →(iii), (c) →(ii)

Q49.Identify A in the following reaction. (1) (2) (3) (4)

Q49.To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed by H2S . The total number of cations precipitated during this reaction is/are : (1) 1 (2) 3 (3) 4 (4) 2

Q49.Match List - I with List - II : List-I (Class of Chemicals) List-II (Example) (a) Antifertility drug (i) Meprobamate (b) Antibiotic (ii) Alitame (c) Tranquilizer (iii) Norethindrone (d) Artificial Sweetener (iv) Salvarsan (1) (a) −(ii), (b) −(iii), (c) −(iv), (d) −(i) (2) (a) −(iv), (b) −(iii), (c) −(ii), (d) −(i) (3) (a) −(iii), (b) −(iv), (c) −(i), (d) −(ii) (4) (a) −(ii), (b) −(iv), (c) −(i), (d) −(iii)

Q49. The Major Product in the above reaction is : JEE Main 2021 (26 Aug Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q49.Match List-I with List-II List-I List-II Test/Reagents/Observation(s) Species detected (a) Lassaigne's Test (i) Carbon (b)Cu(II) oxide (ii) Sulphur N, S, P, and (c) Silver nitrate (iii) halogen (d)The sodium fusion extract gives black precipitate with (iv) Halogen acetic acid and lead acetate Specifically The correct match is : (1) (a) −(iii), (b) −(i), (c) −(ii), (d) −(iv) (2) (a) −(i), (b) −(iv), (c) −(iii), (d) −(ii) (3) (a) −(iii), (b) −(i), (c) −(iv), (d) −(ii) (4) (a) −(i), (b) −(ii), (c) −(iv), (d) −(iii)

Q49.Which statement is correct? JEE Main 2021 (25 Feb Shift 1) JEE Main Previous Year Paper (1) Synthesis of Buna- S needs nascent oxygen. (2) Buna- S is a synthetic and linear thermosetting polymer. (3) Buna- N is a natural polymer. (4) Neoprene is an addition copolymer used in plastic bucket manufacturing.

Q49.The major product formed in the following reaction is : (1) (2) (3) (4) JEE Main 2021 (31 Aug Shift 1) JEE Main Previous Year Paper

Q49.Which one among the following chemical tests is used to distinguish monosaccharide from disaccharide ? (1) Seliwanoff's test (2) Iodine test (3) Barfoed test (4) Tollen's test

Q49.With respect to drug-enzyme interaction, identify the wrong statement: (1) Non-Competitive inhibitor binds to the allosteric (2) Allosteric inhibitor changes the enzyme's active site site (3) Allosteric inhibitor competes with the enzyme's (4) Competitive inhibitor binds to the enzyme's active site active site

Q49.The correct structure of Ruhemann's Purple, the compound formed in the reaction of Ninhydrin with proteins is: (1) (2) (3) (4)

Q49.Given below are two statements: Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non- luminous flame. In the light of the above statements, choose the most appropriate answer from the options given below. (1) Statement I is false but Statement II is true (2) Both Statement I and Statement II are false (3) Both Statement I and Statement II are true (4) Statement I is true but Statement II is false

Q49.Sodium stearate CH3CH216COO-Na+ is an anionic surfactant which forms micelles in oil. Choose the correct statement for it from the following : (1) It forms spherical micelles with CH3CH216 - (2) It forms non-spherical micelles with -COO- group group pointing towards the centre of sphere. pointing outwards on the surface. (3) It forms spherical micelles with CH3CH216 - (4) It forms non-spherical micelles with CH3CH216 - group pointing outwards on the surface of sphere group pointing towards the centre.

Q49.Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent? (1) Seliwanoff's test (2) Biuret test for peptide bond (3) Barfoed's test (4) Benedict's test

Q50.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar. Reason (R): Sucrose involves glycosidic linkage between C1 of β -glucose and C2 of α-fructose. Choose the most appropriate answer from the options given below : (1) Both (A) and (R) are true and (R) is the true explanation of (A). (2) (A) is true but (R) is false. (3) (A) is false but (R) is true. (4) Both (A) and (R) are true but (R) is not the true explanation of (A). Q51. 100 mL of Na3 PO4 solution contains 3. 45 g of sodium. The molarity of the solution is ..... ×10−2 mol L−1 . (Nearest integer) [Atomic Masses - Na : 23. 0u, O : 16. 0u, P : 31. 0u]

Q50.Which of the glycosidic linkage between galactose and glucose is present in lactose? (1) C −1 of glucose and C −4 of galactose (2) C −1 of glucose and C −6 of galactose (3) C −1 of galactose and C −4 of glucose (4) C −1 of galactose and C −6 of glucose

Q50.Identify the incorrect statement from the following. (1) Amylose is a branched chain polymer of glucose (2) Starch is a polymer of α −D glucose (3) β−Glycosidic linkage makes cellulose polymer (4) Glycogen is called as animal starch

Q50. In the above reactions, the enzyme A and enzyme B respectively are :- (1) Amylase and Invertase (2) Invertase and Amylase (3) Invertase and Zymase (4) Zymase and Invertase