Practice Questions

Q57.The main reduction product of the following compound with NaBH4 in methanol is: (1) (2) (3) (4)

Q58.The increasing order of basicity of the following compounds is : (1) (iv) < (ii) < (i) <(iii) (2) (i) < (ii) < (iii) < (iv) (3) (ii) < (i) < (iii) < (iv) (4) (ii) < (i) < (iv) < (iii)

Q58. The increasing order of diazotisation of the following compounds is: (a) (b) JEE Main 2018 (15 Apr Shift 2 Online) JEE Main Previous Year Paper (c) (d) (1) (D) < (C) < (B) < (A) (2) (A) < (D) < (B) < (C) (3) (A) < (B) < (C) < (D) (4) (A) < (D) < (C) < (B)

Q58.The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is JEE Main 2018 (15 Apr) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.Products A and B formed in the following reactions are respectively: JEE Main 2018 (16 Apr Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q58.The copolymer formed by addition polymerization of styrene and acrylonitrile in the presence of peroxide is: (1) (2) (3) (4)

Q59.Which of the following statements is not true? (1) Chain growth polymerisation involves (2) Chain growth polymerisation includes both homopoly-merisation only homo-polymerisation and copolymerisation (3) Nylon 6 is an example of step-growth (4) Step growth polymerisation requires a polymerisation bifunctional monomer

Q59.Glucose on prolonged heating with HI gives (1) 6−iodohexanal (2) n−Hexane (3) 1−Hexene (4) Hexanoic acid

Q59.The correct match between items of List-I and List-II is: List –I List - II (A) Phenelzine (P) Pyrimidine (B) Chloroxylenol (Q) Furan (C) Uracil (R) Hydrazine (D) Ranitidine (S) Phenol (1) (A) −(S), (B) −(R), (C) −(Q), (D) −(P) (2) (A) −(R), (B) −(S), (C) −(P), (D) −(Q) (3) (A) −(R), (B) −(S), (C) −(Q), (D) −(P) (4) (A) −(S), (B) −(R), (C) −(P), (D) −(Q)

Q59.Which of the following will not exist in zwitter ionic form at pH = 7 ? (1) (2) (3) (4)

Q59.Which of the following will not exist in Zwitterionic form at pH = 7 ? (1) (2) (3) (4)

Q60.The predominant form of histamine present in human blood is (pKa, Histidine = 60) JEE Main 2018 (08 Apr) JEE Main Previous Year Paper (1) (2) (3) (4)

Q60.Which of the following is the correct structure of adenosine ? JEE Main 2018 (15 Apr Shift 1 Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q60.The dipeptide, Gln-Gly, on treatment with CH3COCl followed by aqueous work up gives. (1) (2) (3) (4)

Q60.Which of the following is the correct structure of adenosine? (1) (2) (3) (4) JEE Main 2018 (15 Apr) JEE Main Previous Year Paper

Q60.Among the following, the incorrect statement is JEE Main 2018 (16 Apr Online) JEE Main Previous Year Paper (1) cellulose and amylose has 1, 4−glycosidic linkage. (2) lactose contains β −D−galactose and β −D−glucose. (3) maltose and lactose has 1, 4−glycosidic linkage. (4) sucrose and amylose has 1, 2−glycosidic linkage.

Q61.If |z −3 + 2i| ≤4 then the difference between the greatest value and the least value of |z| is (1) √13 (2) 2√13 (3) 8 (4) 4 + √13

Q61.Let S = {x ∈R : x ≥0 & 2 √x −3 + √x (√x −6) + 6 = 0} . Then S : (1) Contains exactly four elements (2) Is an empty set (3) Contains exactly one element (4) Contains exactly two elements

Q61.Let p, q and r be real numbers (p ≠q, r ≠0), such that the roots of the equation x+p1 + x+q1 = 1r are equal in magnitude but opposite in sign, then the sum of squares of these roots is equal to (1) p2 + q2 (2) p2+q2 2 (3) 2(p2 + q2) (4) p2 + q2 + r2

Q61.If λ ∈R is such that the sum of the cubes of the roots of the equation x2 + (2 −λ)x + (10 −λ) = 0 is minimum, then the magnitude of the difference of the roots of this equation is : (1) 4√2 (2) 20 (3) 2√5 (4) 2√7

Q61.If λ ∈R is such that the sum of the cubes of the roots of the equation, x2 + (2 −λ)x + (10 −λ) = 0 is minimum, then the magnitude of the difference of the roots of this equation is (1) 20 (2) 2√5 (3) 2√7 (4) 4√2 z ∈C satisfying |z| = 1

Q62.If tan A and tan B are the roots of the quadratic equation 3x2 −10x −25 = 0 , then the value of 3 sin2(A + B) −10 sin(A + B) cos(A + B) −25 cos2(A + B) is : (1) −25 (2) 10 (3) −10 (4) 25 z ∈C satisfying |z| = 1

Q62.If an angle A of a ΔABC satisfies 5 cos A + 3 = 0, then the roots of the quadratic equation 9x2 + 27x + 20 = 0 are (1) sec A, cot A (2) sec A, tan A (3) tan A, cos A (4) sin A, sec A n = 1 is

Q62.The set of all α ∈R, for which w = 1+(1−8α)z1−z is a purely imaginary number, for all and Re z ≠1 , is (1) {0} (2) an empty set (3) {0, 14 , −14 } (4) equal to R

Q62.The number of four letter words that can be formed using the letters of the word BARRACK is (1) 144 (2) 120 (3) 264 (4) 270 and Bn = 1 −An . Then, the least odd natural number p