Practice Questions

Q59.Formation of which complex, among the following, is not a confirmatory test of Pb2+ ions (1) Lead sulphate (2) Lead nitrate (3) Lead chromate (4) Lead iodide

Q59.The ratio of spin-only magnetic moment values 3 - + μeffCr ( CN ) 6 / μeffCrH2O63 is _______

Q59.The product (P) formed from the following multistep reaction is: (1) (2) (3) (4)

Q59.At 298 K, the standard reduction potential for Cu2 + / Cu electrode is 0 . 34 V. Given : = 0 . 059 V The reduction potential at pH = 14 for the above couple KspCu(OH ) 2 = 1 × 10-20 Take 2 . 303RTF is ( - )𝑥× 10-2 V. The value of x is

Q59.A molecule undergoes two independent first order reactions whose respective half lives are 12 min and 3 min. If both the reactions are occurring then the time taken for the 50% consumption of the reactant is ______ min. (Nearest integer)

Q59.Compoun ′B′ is (1) (2) (3) (4)

Q59.Match List I with List II List I List II (Example) (Type) A 2-chloro- 1, 3-butadiene I Biodegradable polymer B Nylon 2-nylon 6 II Synthetic Rubber C Polyacrylonitrile III Polyester D Dacron IV Addition Polymer Choose the correct answer from the options given below: (1) A(II), B(IV), C(I), D(III) (2) A(II), B(I), C(IV), D(III) (3) A(IV), B(I), C(III), D(II) (4) A(IV), B(III), C(I), D(II)

Q59.Match items of Row I with those of Row II. Row I: (P) (Q) (R) JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (S) Row II: (i) α‐D‐(—) Fructofuranose. (ii) β‐D‐(—) Fructofuranose. (iii) α‐D‐(‐) Glucopyranose. (iv) β‐D‐(‐) Glucopyranose. Correct match is (1) P→iv, Q→iii, R→i, S→ii (2) P→i, Q→ii, R→iii, S→iv (3) P→iii, Q→iv, R→ii, S→i (4) P→iii, Q→iv, R→i, S→ii

Q59.Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R. Assertion A : Antihistamines do not affect the secretion of acid in stomach. Reason R : Antiallergic and antacid drugs work on different receptors. In the light of the above statements, choose the correct answer from the options given below: (1) A is false but R is true (2) Both A and R are true and R is the correct explanation of A (3) A is true but R is false (4) Both A and R are true but R is not the correct explanation of A .

Q59.In ammonium - phosphomolybdate, the oxidation state of Mo is +_______ JEE Main 2023 (06 Apr Shift 1) JEE Main Previous Year Paper

Q59.Match List I with List II LIST II LIST I Type Name AAntifertility I Norethindrone drug B Tranquilizer II Meprobomate C AntihistamineIII Seldane DAntibiotic IVAmpicillin JEE Main 2023 (24 Jan Shift 2) JEE Main Previous Year Paper Choose the correct answer from the options given below : (1) A-II, B-I, C-III, D-IV (2) A-IV, B-III, C-II, D-I (3) A-I, B-III, C-II, D-IV (4) A-I, B-II, C-III, D-IV

Q59.Given below are two statements : Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green. Statement II : The green colour observed is due to the formation of copper(I) metaborate In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are false (2) Both Statement I and Statement II are true (3) Statement I is false but Statement II is true (4) Statement I is true but Statement II is false

Q60.How many of the transformation given below would result in aromatic amines? JEE Main 2023 (31 Jan Shift 1) JEE Main Previous Year Paper

Q60.An athlete is given 100 g of glucose (C6H12O6) for energy. This is equivalent to 1800 kJ of energy. The 50% of this energy gained is utilized by the athlete for sports activities at the event. In order to avoid storage of energy, the weight of extra water he would need to perspire is _____g (Nearest integer) Assume that there is no other way of consuming stored energy. Given : The enthalpy of evaporation of water is 45 kJ mol−1 Molar mass of C, H&O are 12.1 and 16 g mol−1 .

Q60.In an oligopeptide named Alanylglycylphenyl alanyl isoleucine, the number of sp2 hybridised carbons is _____. is equal to

Q60.Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): α-halocarboxylic acid on reaction with dil. NH3 gives good yield of α-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason (R): Amino acids exist in zwitter ion form in aqueous medium. In the light of the above statements, choose the correct answer from the options given below : (1) Both (A) and (R) are correct and (R) is the (2) Both (A) and (R) are correct but (R) is not the correct explanation of (A). correct explanation of (A). (3) (A) is correct but (R) is not correct. (4) (A) is not correct but (R) is correct.

Q60.Total number of tripeptides possible by mixing of valine and proline is ________ .

Q60.The difference in the oxidation state of Xe between the oxidised product of Xe formed on complete hydrolysis of XeF4and XeF4 is 2𝑧- 3𝑖

Q60.In potassium ferrocyanide, there are ______ pairs of electrons in the t2g set of orbitals. 2𝑧- 3𝑖

Q60.Number of cyclic tripeptides formed with 2 amino acids A and B is: (1) 2 (2) 3 (3) 5 (4) 4

Q60.A. Ammonium salts produce haze in atmosphere. B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals. C. Polychlorinated biphenyls act as cleansing solvents. D. ‘Blue baby’ syndrome occurs due to the presence of excess of sulphate ions in water. JEE Main 2023 (25 Jan Shift 2) JEE Main Previous Year Paper Choose the correct answer from the options given below:- (1) A, B and C only (2) B and C only (3) A and D only (4) A and C only

Q60.Match the following Column −A Column −B a. Nylon 6 I. Natural Rubber b. Vulcanized Rubber II. Cross Linked c. cis −1, 4−polyisoprene III. Caprolactam d. Polychloroprene IV. Neoprene Choose the correct answer from options given below: (1) a →III, b →II, c →I, d →IV (2) a →III, b →IV, c →I, d →II (3) a →IV, b →III, c →II, d →I (4) a →II, b →III, c →IV, d →I ¯

Q60.A short peptide on complete hydrolysis produces 3 moles of glycine (G), two moles of leucine (L) and two moles of valine (V) per mole of peptide. The number of peptide linkages in it are _____ .

Q60.Given below are two statements: Statement I: Ethane at 333 to 343 K and 6 −7 atm pressure in the presence of AlEt3 and TiCl4 undergoes addition polymerization to give LDP. Statement II: Caprolactam at 533 −543 K in H2O through step growth polymerizes to give Nylon 6. In the light of the above statements, choose the correct answer from the options given below: (1) Statement I is false but Statement II is true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are true (4) Both Statement I and Statement II are false

Q60.Number of moles of AgCl formed in the following reaction is _____ . JEE Main 2023 (24 Jan Shift 1) JEE Main Previous Year Paper