Practice Questions

Q57.In Williamson synthesis of mixed ether having a primary and a tertiary alkyl group if tertiary halide is used, then : (1) Rate of reaction will be slow due to slow (2) Alkene will be the main product. cleavage of carbon-halogen bond. (3) Simple ether will form instead of mixed ether. (4) Expected mixed ether will be formed.

Q57.An ether (A), C5H12O, when heated with excess of hot concentrated HI produced two alkyl halides which when treated with NaOH yielded compounds (B) and (C). Oxidation of (B) and (C) gave a propanone and an ethanoic acid respectively. The IUPAC name of the ether (A) is : (1) 2−ethoxypropane (2) ethoxypropane (3) methoxybutane (4) 2−methoxybutane

Q58.Formaldehyde can be distinguished from acetaldehyde by the use of : (1) Schiff's reagent (2) Tollen's reagent (3) I2 /Alkali (4) Fehling's solution

Q58.Which of the following statement is not correct? (1) Amylopectin is a branched polymer of α - (2) Cellulose is a linear polymer of β-glucose. glucose. (3) Glycogen is the food reserve of plants. (4) All proteins are polymers of α - amino acids.

Q58.An organic compound A upon reacting with NH3 gives B. On heating, B gives C. C in presence of KOH reacts with Br2 to give CH3CH2NH2. A is : (1) (2) CH3CH2COOH (3) CH3COOH (4) CH3CH2CH2COOH

Q58. H1− Receptor antagonists is a term associated with : (1) Antiseptics (2) Antihistamins (3) Antacids (4) Analgesics

Q58.The polymer used for optical lenses is : (1) polypropylene (2) polyvinyl chloride (3) polythene (4) polymethyl methacrylate

Q59.A compound with molecular mass 180 is acylated with CH3 COCl to get a compound with molecular mass 390 . The number of amino groups presents per molecule of the former compound is (1) 4 (2) 6 (3) 2 (4) 5

Q59.Glycosidic linkage is actually an : (1) Carbonyl bond (2) Ether bond (3) Ester bond (4) Amide bond JEE Main 2013 (23 Apr Online) JEE Main Previous Year Paper

Q59.Which of the following statements about aspirin is not true? (1) It is effective in relieving pain. (2) It is a neurologically active drug. (3) It has antiblood clotting action. (4) It belongs to narcotic analgesics.

Q59.Bakelite is obtained from phenol by reacting with: (1) Acetal (2) CH3CHO (3) HCHO (4) Chlorobenzene

Q59.If a polythene sample contains two monodisperse fractions in the ratio 2 : 3 with degree of polymerization 100 and 200, respectively, then its weight average molecular weight will be : (1) 4900 (2) 4600 (3) 4300 (4) 5200

Q60.Synthesis of each molecule of glucose in photosynthesis involves (1) 8 molecules of ATP (2) 6 molecules of ATP (3) 18 molecules of ATP (4) 10 molecules of ATP

Q60.Which of the following structures represents thymine ? (1) (2) (3) (4)

Q60.Natural glucose is termed D-glucose because : (1) −OH on the second carbon is on the right side in (2) −OH on the sixth carbon is on the right side in Fischer projection Fischer projection. (3) −OH on the fifth carbon is on the right side in (4) It is dextrorotatory. Fischer projection.

Q60.Among the following vitamins the one whose deficiency causes rickets (bone deficiency) is : (1) Vitamin A (2) Vitamin B (3) Vitamin D (4) Vitamin C

Q60.Which of the following enzyme converts starch into maltose? (1) Diastase (2) Maltase (3) Zymase (4) Invertase

Q61.The real number k for which the equation, 2x3 + 3x + k = 0 has two distinct real roots in [0, 1] belongs to (1) lies between −1 and 0. (2) does not exist. (3) lies between 1 and 2 . (4) lies between 2 and 3 .

Q61.If p and q are non-zero real numbers and α3 + β3 = −p, αβ = q , then a quadratic equation whose roots are α2 β2 β , α is : (1) px2 −qx + p2 = 0 (2) qx2 + px + q2 = 0 (3) px2 + qx + p2 = 0 (4) qx2 −px + q2 = 0

Q61.The values of ' a ' for which one root of the equation x2 −(a + 1)x + a2 + a −8 = 0 exceeds 2 and the other is lesser than 2 , are given by : (1) 3 < a < 10 (2) a ≥10 (3) −2 < a < 3 (4) a ≤−2 JEE Main 2013 (09 Apr Online) JEE Main Previous Year Paper

Q61.If α and β are roots of the equation x2 + px + 3p4 = 0 , such that |α −β| = √10 , then p belongs to the set : (1) {2, −5} (2) {−3, 2} (3) {−2, 5} (4) {3, −5}

Q61.The least integral value α of x such that x−5 > 0, satisfies : x2+5x−14 (1) α2 + 3α −4 = 0 (2) α2 −5α + 4 = 0 (3) α2 −7α + 6 = 0 (4) α2 + 5α −6 = 0 , where z is any non-zero complex number. The set A = {a : |z| = 1 and z ≠±1} is equal

Q62.If the equations x2 + 2x + 3 = 0 and ax2 + bx + c = 0, a, b, c ∈R, have a common root, then a : b : c is: (1) 1 : 3 : 2 (2) 3 : 1 : 2 (3) 1 : 2 : 3 (4) 3 : 2 : 1 JEE Main 2013 (07 Apr) JEE Main Previous Year Paper (given z ≠−1)

Q62.If Z1 ≠0 and Z2 be two complex numbers such that Z2 is a purely imaginary number, then 2Z1+3Z2 is equal Z1 2Z1−3Z2 to: (1) 2 (2) 5 (3) 3 (4) 1

Q62.Let a = Im ( 1+z22iz ) to: (1) (−1, 1) (2) [−1, 1] (3) [0, 1) (4) (−1, 0]