Practice Questions

Q50.Match List I with List II List-I List-II A. Glucose/NaHCO3 / ∆ I. Gluconic acid B. Glucose/HNO3 II. No reaction JEE Main 2024 (31 Jan Shift 1) JEE Main Previous Year Paper C. Glucose/HI / ∆ III. n-hexane D. Glucose/Bromine water IV. Saccharic acid Choose the correct answer from the options given below: (1) A-IV, B-I, C-III, D-II (2) A-II, B-IV, C-III, D-I (3) A-III, B-II, C-I, D-IV (4) A-I, B-IV, C-III, D-II

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. List - I List - II A. α - Glucose and α - Galactose I. Functional isomers Match List I with List II B. α - Glucose and β - Glucose II. Homologous Choose the C. α - Glucose and α - Fructose III. Anomers D. α - Glucose and α - Ribose IV. Epimers correct answer from the options given below: (1) A-IV, B-III, C-I, D-II (2) A-III, B-IV, C-I, D-II (3) A-IV, B-III, C-II, D-I (4) A-III, B-IV, C-II, D-I

Q50. Match List I with List II Choose the correct answer from the options given below :- (1) A-II, B-I, C-III, D-IV (2) A-IV, B-II, C-I, D-III (3) A-I, B-III, C-IV, D-II (4) A-II, B-III, C-I, D-IV

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.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.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. What is the structure of C JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q50. The incorrect statement regarding the given structure is (1) can be oxidized to a dicarboxylic acid with Br2 (2) will coexist in equilibrium with 2 other cyclic water structure (3) despite the presence of - CHO does not give (4) has 4 asymmetric carbon atom Schiff's test JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper

Q50.DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure. (1) (2) (3) (4)

Q50.Match List I with List I List I (Substances) List II (Element Present) A. Ziegler catalyst I. Rhodium B. Blood Pigment II. Cobalt C. Wilkinson catalyst III. Iron D. Vitamin B12 IV. Titanium Choose the correct answer from the options given below: (1) A-II, B-IV, C-I, D-III (2) A-II, B-III, C-IV, D-I (3) A-III, B-II, C-IV, D-I (4) A-IV, B-III, C-I, D-II

Q50.The incorrect statement about Glucose is : (1) Glucose is soluble in water because of having (2) Glucose remains in multiple isomeric form in its aldehyde functional group aqueous solution (3) Glucose is one of the monomer unit in sucrose (4) Glucose is an aldohexose

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 _______ % .

Q51.Number of spectral lines obtained in He+ spectra, when an electron makes transition from fifth excited state to first excited state will be

Q61.Let S1 = {z ∈C : |z| ≤5}, S2 = {z ( z+1−√3i1−√3i ) ≥0} area of the region S1 ∩S2 ∩S3 is : (1) 125π (2) 125π 12 4 (3) 125π (4) 125π 24 6 Q62.60 words can be made using all the letters of the word BHBJO, with or without meaning. If these words are written as in a dictionary, then the 50th word is : (1) JBBOH (2) OBBJH (3) OBBHJ (4) HBBJO

Q61.Let 𝑆= 𝑥∈𝑅: √3 + √2 𝑥+ √3 −√2 𝑥= 10. Then the number of elements in 𝑆 is: (1) 4 (2) 0 (3) 2 (4) 1

Q61.If z1, z2 are two distinct complex number such that z1−2z21 = 2, then 2 −z1¯z2 (1) z1 lies on a circle of radius 21 and z2 lies on a (2) both z1 and z2 lie on the same circle. both z1 and circle of radius 1 . z2 lie on the same circle. (3) either z1 lies on a circle of radius 21 or z2 lies on (4) either z1 lies on a circle of radius 1 or z2 lies on a a circle of radius 1 . circle of radius 1 . 2

Q61.Let α, β; α > β , be the roots of the equation x2 −√2x −√3 = 0. Let Pn = αn −βn, n ∈N . Then (11√3 −10√2)P10 + (11√2 + 10)P11 −11P12 is equal to (1) 10√3P9 (2) 11√3P9 (3) 10√2P9 (4) 11√2P9

Q61.Let α, β be the distinct roots of the equation x2 −(t2 −5t + 6)x + 1 = 0, t ∈R and an = αn + βn . Then the minimum value of a2023+a2025 is a2024 (1) −1/4 (2) −1/4 (3) −1/2 (4) 1/4

Q61.Let 𝑆 be the set of positive integral values of 𝑎 for which 𝑎𝑥2 + 2𝑎+ 1𝑥+ 9𝑎+ 4 < 0, ∀𝑥∈ℝ. Then, the number 𝑥2 - 8𝑥+ 32 of elements in 𝑆 is: (1) 1 (2) 0 (3) ∞ (4) 3

Q61.The sum of all the solutions of the equation (8)2x −16 ⋅(8)x + 48 = 0 is : (1) 1 + log8(6) (2) 1 + log6(8) (3) log8(6) (4) log8(4) –z+1 1

Q61.If z = 21 −2i, is such that z + 1 = αz + β(1 i), (1) −4 (2) 3 (3) 2 (4) −1

Q61.The number of solutions, of the equation 𝑒sin𝑥−2𝑒−sin𝑥= 2 is (1) 2 (2) more than 2 (3) 1 (4) 0

Q61.If S = z ∈C : |z −i| = |z + i| = |z −1|, then, n(S) is: (1) 1 (2) 0 (3) 3 (4) 2

Q61.Let r and θ respectively be the modulus and amplitude of the complex number z = 2 −i(2 tan 5π8 ), then (r, θ) is equal to (1) (2 sec 3π8 , 3π8 ) (2) (2 sec 3π8 , 5π8 ) (3) (2 sec 5π8 , 3π8 ) (4) (2 sec 11π8 , 11π8 )