Practice Questions

Q44.If a person is suffering from the deficiency of nor-adrenaline, what kind of drug can be suggested? (1) Anti-inflammatory (2) Antidepressant (3) Antihistamine (4) Analgesic

Q44.Which polymer has 'chiral' monomer(s)? (1) Neoprene (2) Buna −N (3) Nylon 6,6 (4) PHBV

Q44.Which of the following will react with CHCl3 + alc. KOH? (1) Adenine and proline (2) Thymine and proline (3) Adenine and lysine (4) Adenine and thymine

Q44.The correct match between item - I and item - II is : Item - I Item - II (a) Natural rubber (I) 1, 3-butadiene + styrene (b) Neoprene (II) 1, 3-butadiene (c) Buna-N (III) chloroprene (d) Buna-S (IV) Isoprene (1) (a)-(III), (b)-(IV), (c)-(I), (d)-(II) (2) (a)-(III), (b)-(IV), (c)-(II), (d)-(I) (3) (a)-(IV), (b)-(III), (c)-(II), (d)-(I) (4) (a)-(IV), (b)-(III), (c)-(I), (d)-(II)

Q44.Which one of the following polymers is not obtained by condensation polymerisation ? (1) Nylon 6, 6 (2) Buna – N (3) Bakelite (4) Nylon 6

Q44.The increasing order of pKb values of the following compounds is : (1) II < IV < III < I (2) I < II < IV < III (3) II < I < III < IV (4) I < II < III < IV

Q44.An ionic micelle is formed on the addition of: (1) liquid diethyl ether to aqueous NaCl solution (2) (3) (4) Sodium stearate to pure toluene

Q44.The major products A and B in the following reactions are JEE Main 2020 (08 Jan Shift 1) JEE Main Previous Year Paper (1) (2) and and (3) (4) and and

Q44.Two monomers in maltose are: (1) α −D− glucose and β −D− glucose (2) α −D− glucose and α −D− galactose (3) α −D− glucose and α −D− Fructose (4) α −D− glucose and α −D− glucose

Q44.Consider the following reaction: The product 'X' is used: (1) in protein estimation as an alternative to (2) in acid base titration as an indicator ninhydrin (3) as food grade colourant (4) in laboratory test for phenols

Q44.The major product Z obtained in the following reaction scheme is: (1) (2) (3) (4)

Q44.If you spill a chemical toilet cleaning liquid on your hand, your first aid would be: (1) vinegar (2) aqueous NaOH (3) aqueous NaHCO3 (4) aqueous NH3

Q44.The major aromatic product C in the following reaction sequence will be : (1) (2) (3) (4)

Q44.In the following reaction sequence, the major product B is (1) (2) (3) (4)

Q44.An organic compound [A], molecular formula C10H20O2 was hydrolyzed with dilute sulphuric acid to given a carboxylic acid [B] and an alcohol [C]. Oxidation of [C] with CrO3 −H2 SO4 produced [B]. Which of the following structures are not possible for [A] (1) (2) (3) CH3 CH2 CH2 COOCH2 CH2 CH2 CH3 (4) (CH3)3 −C −COOCH2 C(CH3)3

Q45.Match the following : (i) Riboflavin (a) Beriberi (ii) Thiamine (b) Scurvy (iii) Pyridoxine (c) Cheilosis (iv) Ascorbic acid (d) Convulsions (1) (i) −(a), (ii) −(d), (iii) −(c), (iv) −(b) (2) (i) −(c), (ii) −(d), (iii) −(a), (iv) −(b) (3) (i) −(c), (ii) −(a), (iii) −(d), (iv) −(b) (4) (i) −(d), (ii) −(b), (iii) −(a), (iv) −(c)

Q45. A, B and C are three biomolecules. The results of the tests performed on them are given below: Molisch's test Barfoed Test Biuret Test A Positive Negative Negative B Positive Positive Negative C Negative Negative Positive A, B and C are respectively: (1) A = Glucose, B = Fructose C = Albumin (2) A = Lactose, B = Glucose, C = Albumin (3) A = Lactose, B = Glucose, C = Alanine (4) A = Lactose, B = Fructose, C = Alanine Q46. 10.30mg of O2 is dissolved into a liter of sea water of density 1.03g/mL . The concentration of O2 in ppm is _____________.

Q45.Which of the following is not an essential amino acid? (1) Tyrosine (2) Leucine (3) Valine (4) Lysine

Q45.Consider the Assertion and Reason given below. Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins. Reason (R) : High density polymers are closely packed and are chemically inert. Choose the correct answer from the following: (1) (A) is correct but (R) is wrong. (2) Both (A) and (R) are correct but (R) is not the correct explanation of (A). (3) Both (A) and (R) are correct and (R) is the (4) (A) and (R) both are wrong. correct explanation of (A).

Q45.The mechanism of action of "Terfenadine" (Seldane) is : (1) Activates the histamine receptor (2) Inhibits the secretion of histamine (3) Helps in the secretion of histamine (4) Inhibits the action of histamine receptor

Q45. The correct observation in the following reaction is: Gly cosidic bond Seliw anoff −−Sucrose → A + B → ? Cleavage (Hydrolysis) Reagent (1) Formation of blue colour (2) Gives no colour (3) Formation of red colour (4) Formation of violet colour

Q45.Consider the following reactions : dry HCI x eq. of −−(i) Glucose +ROH → Acetal → acetyl derivative (CH3 CO)2 Ni /H2 y eq. of −−(ii) Glucose → A → acetyl derivative (CH3 CO)2O z eq. of −(iii) Glucose → acetyl derivative ' x' , ' y' and ' z' in these reactions are respectively. (CH3 CO)2O (1) 5, 4 & 6 (2) 4, 6 & 5 (3) 4, 5 & 5 (4) 5, 6 & 5

Q45.Which of the following statement is not true for glucose? (1) Glucose exists in two crystalline forms α and β (2) Glucose gives Schiff’s test for aldehyde (3) Glucose reacts with hydroxylamine to form (4) The pentaacetate of glucose does not react with oxime hydroxylamine to give oxime

Q45.Which of the following statements is correct? (1) Gluconic acid can form cyclic (acetal/hemiacetal) (2) Gluconic acid is a dicarboxylic acid structure (3) Gluconic acid is a partial oxidation product of (4) Gluconic acid is obtained by oxidation of glucose glucose with HNO3 JEE Main 2020 (07 Jan Shift 2) JEE Main Previous Year Paper

Q45.A chemist has 4 samples of artificial sweetener A, B, C and D . To identify these samples, he performed certain experiments and noted the following observations: (i) A and D both form blue-violet colour with ninhydrin. (ii) Lassaigne extract of C gives positive AgNO3 test and negative Fe4[Fe(CN)6]3 test. (iii) Lassaigne extract of B and D gives positive sodium nitroprusside test. Based on these observations which option is correct? (1) A : Aspartame; B : Saccharin; C : Sucralose; D : (2) A : Alitame; B : Saccharin; C : Aspartame; D : Alitame Sucralose (3) A : Saccharin; B : Alitame; C : Sucralose; D : (4) A : Aspartame; B : Alitame; C : Saccharin; D : Aspartame Sucralose