Practice Questions

Q50.Given below are two statements : Statement I : Noradrenaline is a neurotransmitter. Statement II : Low level of noradrenaline is not the cause of depression in human. In the light of the above statements, choose the correct answer from the options given below (1) Both statement 1 and 2 are correct.. (2) Statement 1 is correct but statement 2 is incorrect (3) Statement 1 is incorrect but statement 2 is correct (4) Both statement 1 and 2 are correct

Q50.A protein ‘X’ with molecular weight of 70, 000 u, on hydrolysis gives amino acids. One of these amino acid is (1) (2) (3) (4)

Q50.Which is not true for arginine? (1) It has a fairly high melting point (2) It is associated with more than one pKa values. (3) It has high solubility in benzene. (4) It is a crystalline solid.

Q50.Match List I and List II List I List II Functional group / Test Class of Compound (A) Molisch's Test (I)Peptide (B) Biuret Test (II)Carbohydrate (C) Carbylamine Test (III) Primary amine (D) Schiff's Test (IV) Aldehyde Choose the correct answer from the options given below: (1) (A) - I, (B) - II, (C) - III, (D) - IV (2) (A) - III, (B) - IV, (C) -I, (D) - II (3) (A) - II, (B) - I, (C) - III, (D) - IV (4) (A) - III, (B) - IV, (C) -II, (D) - I

Q50.A chloride salt solution acidified with dil. HNO3 gives a curdy white precipitate, [A], on addition of AgNO3 . [A] on treatment with NH4 OH gives a clear solution, B. (1) H[AgCl3]&[Ag (NH3)2] Cl (2) H[AgCl3] & (NH4)[Ag(OH)2] (3) AgCl & [Ag (NH3)2] Cl (4) AgCl & (NH4)[Ag(OH)2]

Q50.Match the List-I with List-II : Cations Group reaction P →Pb2+, Cu2+ H2 S gas in presence of dilute HCl Q →Al3+, Fe3+ (NH4)2 CO3 in presence of NH4 OH R →Co2+, Ni2+ NH4 OH in presence of NH4 CI S →Ba2+, Ca2+ H2 S in presence of NH4 OH (1) P →i, Q →iii, R →ii, S →iv (2) P →iv, Q →ii, R →iii, S →i (3) P →iii, Q →i, R →iv, S →ii (4) P →i, Q →iii, R →iv, S →ii

Q50.Which one amongst the following are good oxidising agents? (a) Sm2+ (b) Ce2+ (c) Ce4+ (d) Tb4+ Choose the most appropriate answer from the options given below : (1) C only (2) D only (3) A and B only (4) C and D only

Q50.The naturally occurring amino acid that contains only one basic functional group in its chemical structure is (1) asparagine (2) histidine (3) arginine (4) lysine Q51.1 g of a carbonate M2CO3 on treatment with excess HCl produces 0 . 01 mol of CO2. The molar mass of M2CO3 is gmol-1. (Nearest integer) x is (nearest integer)

Q50.Which one of the following is most likely a mismatch? JEE Main 2023 (13 Apr Shift 1) JEE Main Previous Year Paper (1) Zinc-Liquation (2) Copper-Electrolysis (3) Nickel-Mond process (4) Titanium-van Arkel Method

Q50.Match List I and List II List I List II Vitamin Deficiency disease A Vitamin A I Beri-Beri B Thiamine II Cheilosis C Ascorbic acid III Xerophthalmia D Riboflavin IV Scurvy Choose the correct answer from the options given below (1) A - III, B - I, C - IV, D - II (2) A - IV, B - I, C - III, D - II (3) A - IV, B - II, C - III, D - I (4) A - III, B - II, C - IV, D - I JEE Main 2023 (06 Apr Shift 1) JEE Main Previous Year Paper

Q50.The polymer X-consists of linear molecules and is closely packed. It is prepared in the presence of trimethylammoniumpropyl and titanium tetrachloride under low pressure. The polymer X is (1) High density polythene (2) Polyacrylonitrile (3) Low density polythene (4) Polytetrafluoroethane

Q50.In figure, a straight line is given for Freundrich Adsorption (y = 3x + 2. 505). The value of n1 and logK are respectively. JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper (1) 0. 3 and log 2. 505 (2) 0. 3 and 0. 7033 (3) 3 and 2. 505 (4) 3 and 0. 7033

Q50.Which of the following salt solutions would coagulate the colloid soloution formed when FeCl3 is added to NaOH solution, at the fastest rate? (1) 10 mL of 0. 2 mol dm−3 AlCl3 (2) 10 mL of 0. 1 mol dm−3 Na2 SO4 (3) 10 mL of 0. 1 mol dm−3 Ca3 (PO4)2 (4) 10 mL of 0. 15 mol dm−3 CaCl2

Q50.Four gases, A, B, C and D have critical temperatures 5. 3, 33. 2, 126. 0 and 154. 3K respectively For their adsorption on a fixed amount of charcoal, the correct order is : (1) C > D > B > A (2) C > B > D > A (3) D > C > B > A (4) D > C > A > B

Q50.The one that does not stabilize 2∘ and 3∘ structures of proteins is (1) – S – S – linkage (2) H - bonding (3) – O – O – linkage (4) van der Waals forces

Q50.Match List I with List II List I List II A Physisorption I Single Layer Adsorption B Chemisorption II 20 −40 kJ mol−1 Fe(s) C III Chromatography− N2(g) + 3H2(g) → 2 NH3(g) D Analytical Application or Adsorption IV Heterogeneous catalysis Choose the correct answer from the options given below: (1) A-III, B-IV, C-I, D-II (2) A-II, B-III, C-I, D-IV (3) A-II, B-I, C-IV, D-III (4) A-IV, B-II, C-III, D-I

Q51.In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26 ) (1) V (IV) (2) Mn (VII) (3) Fe (III) (4) Ti (III)

Q51. K2 Cr2 O7 paper acidified with dilute H2 SO4 turns green when exposed to (1) Carbon dioxide (2) Sulphur trioxide (3) Hydrogen sulphide (4) Sulphur dioxide

Q51.Which one of the following statements is incorrect ? (1) van Arkel method is used to purify tungsten. (2) The malleable iron is prepared from cast iron by oxidising impurities in a reverberatory furnace. (3) Cast iron is obtained by melting pig iron with (4) Boron and Indium can be purified by zone scrap iron and coke using hot air blast. refining method.

Q51.Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from (1) +3 to +1 (2) +6 to +3 (3) +2 to +1 (4) +6 to +2

Q51.The set of correct statements is: (i) Manganese exhibits +7 oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides. (iii) Sc shows +4 oxidation state which is oxidizing in nature. (iv) Cr shows oxidising nature in +6 oxidation state. (1) (ii) and (iii) (2) (i), (ii) and (iv) (3) (i) and (iii) (4) (ii), (iii) and (iv)

Q51.Formulae for Nessler's reagent is: (1) KHg2 I2 (2) KHgI3 (3) K2 HgI4 (4) HgI2

Q51.The incorrect statement from the following for borazine is: (1) It contains banana bonds (2) It can react with water (3) It is a cyclic compound (4) It has electronic delocalization

Q51.The total number of isoelectronic species from the given set is ________. O2−, F–, Al, Mg2+, Na+, O+, Mg, Al3+, F Q52. 30. 4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is 28. 4 J K–1 mol–1 at 1 atm. The melting point of sodium chloride is _______ K (Nearest Integer)

Q51.The IUPAC name of K3[Co(C2O4)3] is: (1) Potassium tris(oxalato)cobaltate (III) (2) Potassium tris(oxalato)cobalt (III) (3) Potassium trioxalatocobalt (III) (4) Potassium trioxalatocobaltate (III)