Practice Questions

Q59.Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II) : (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)-(i); (D)-(ii)

Q59.Poly- β -hydroxybutyrate-co- β -hydroxyvalerate (PHBV ) is a copolymer of _____. (1) 3− hydroxybutanoic acid and 4− hydroxypentanoic acid (2) 3− hydroxybutanoic acid and 2− hydroxypentanoic acid (3) 3− hydroxybutanoic acid and 3− hydroxypentanoic acid (4) 2− hydroxybutanoic acid and 3− hydroxypentanoic acid

Q59.The structure of Nylon - 6 is: (1) (2) (3) (4)

Q59.Which of the following tests cannot be used for identifying amino acids? (1) Biuret test (2) Xanthoproteic test (3) Barfoed test (4) Ninhydrin test

Q59. The correct match between Item I and Item II is: (1) (A) →(R); (B) →(P); (C) →(Q); (D) →(S) (2) (A) →(P); (B) →(R); (C) →(Q); (D) →(S) (3) (A) →(R); (B) →(P); (C) →(S); (D) →(Q) (4) (A) →(P); (B) →(R); (C) →(S); (D) →(Q)

Q60.Which of the following statements is not true about RNA? (1) It controls the synthesis of protein (2) It usually does not replicate (3) It has always double standard α - helix structure (4) It is present in the nucleus of the cell

Q60.Which of the following statements is not true about sucrose? (1) It is also named as invert sugar. (2) It is a non-reducing sugar. (3) The glycosidic linkage is present Between C1 of (4) On hydrolysis, it produces glucose and fructose. α -glucose and C1 of β -fructose.

Q60.Maltose on treatment with dilute HCl gives: (1) D-Glucose (2) D-Fructose (3) D-Galactose (4) D-Glucose and D- Fructose

Q60.Which of the given statements is incorrect about glycogen? (1) It is present in animal cells. (2) It is a straight chain polymer similar to amylose. (3) It is present in some yeast and fungi (4) Only α− linkages are present in the molecule.

Q60.Among the following compounds, which one is found in RNA? (1) (2) (3) (4)

Q60.The correct sequence of amino acids present in the tripeptide given below is: (1) Val - Ser - Thr (2) Leu - Ser - Thr (3) Thr - Ser - Val (4) Thr - Ser - Leu

Q33.For Na+, Mg2+, F− and O2− ; the correct order of increasing Ionic radii is : (1) O2−< F−< Na+ < Mg2+ (2) Na+ < Mg2+ < F−< O2− (3) Mg2+ < Na+ < F−< O2− (4) Mg2+ < O2−< Na+ < F−

Q33.Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2 SO4 JEE Main 2018 (08 Apr) JEE Main Previous Year Paper (1) KCl, B2H6 (2) KCl, B2H6, PH3 (3) KCl, H2 SO4 (4) KCl

Q33.For Na+, Mg2+, F− and O2− , the correct order of increasing ionic radii is: (1) O2−< F−< Na+ < Mg2+ (2) Na+ < Mg2+ < F−< O2− (3) Mg2+ < Na+ < F−< O2− (4) Mg2+ < O2−< Na+ < F−

Q35.The incorrect geometry is represented by: (1) NF3 - trigonal planar (2) BF3 - trigonal planar (3) AsF5 - trigonal bipyramidal (4) H2O - bent

Q36.Assuming ideal gas behavior, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is: (Atomic weight of Cl is 35.5 u) (1) 1.46 (2) 1.64 (3) 0.46 (4) 0.64

Q37.In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridization respectively, are (1) 33 and 25 (2) 67 and 75 (3) 50 and 75 (4) 33 and 75

Q37.At a certain temperature in a 5L vessel, 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction, CO + Cl2 ⇌COCl2 . At equilibrium, if one mole of CO is present then equilibrium constant (Kc) for the reaction is: (1) 2.5 (2) 4 (3) 2 (4) 3

Q37.In graphite and diamond, the percentage of p characters of the hybrid orbitals in hybridization are respectively: (1) 33 and 25 (2) 67 and 75 (3) 50 and 75 (4) 33 and 75

Q39.For which of the following reactions, ΔH is equal to ΔU ? (1) N2(g) + 3H2(g) →2NH3(g) (2) 2HI(g) →H2(g) + I2(g) (3) 2SO2 (g) +O2(g) →2SO3(g) (4) 2NO2(g) →N2O4(g)

Q39.For standardizing NaOH solution, which of the following is used as a primary standard? (1) Sodium tetra borate (2) Ferrous Ammonium sulphate (3) Oxalic acid (4) Dil. HCl

Q39.For which of the following reactions, ΔH is equal to ΔU ? (1) N2 (g) + 3H2 (g) →2 NH3 (g) (2) 2 HI (g) →H2(g) + I2(g) (3) 2 SO2 (g) + O2 (g) →2 SO3 (g) (4) 2 NO2 (g) →N2O4 (g)

Q39.Which of the following are Lewis acids? (1) BCl3 and AlCl3 (2) PH3 and BCl3 (3) AlCl3 and CCl4 (4) PH3 and CCl4

Q39.In KO2 , the nature of oxygen species and the oxidation state of oxygen atom are, respectively: (1) Superoxide and −1 (2) Superoxide and −1/2 (3) Peroxide and −1/2 (4) Oxide and −2

Q41.In which of the following reactions, an increase in the volume of the container will favour the formation of products? (1) 4NH3(g) + 5O2(g) ⇌4NO (g) +6H2O(l) (2) 2NO2(g) ⇌2NO(g) + O2 (g) (3) 3O2 ⇌2O3(g) (4) H2(g) + I2(g) ⇌2HI(g)