Practice Questions

Q49.The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ...... A. The catalyst is diffused over the surface of reactants. B. Reactants are adsorbed on the surface of the catalyst. C. Occurrence of chemical reaction on the catalyst's surface through formation of an intermediate. D. It is a combination of intermediate compound formation theory and the old adsorption theory. E. It explains the action of the catalyst as well as those of catalytic promoters and poisons.

Q49.Which of the following artificial sweeteners has the highest sweetness value in comparison to cane sugar? (1) Aspartame (2) Sucralose (3) Alitame (4) Saccharin

Q49.In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis? (1) Fe3 + (2) Zn2 + (3) Co2 + (4) Ni2 +

Q49.Given below are two statements:- Statement I:- In froth floatation method a rotating paddle agitates the mixture to drive air out of it. Statement II:- Iron pyrites are generally avoided for extraction of iron due to environmental reasons. In the light of the above statements, choose the correct answer from the options given below:- (1) Both Statement I and Statement II are true (2) Statement I is false but Statement II is true (3) Statement I is true but Statement II is false (4) Both Statement I and Statement II are false

Q49.Total number of acidic oxides among N2O3, NO2, N2O, Cl2 O7, SO2, CO, CaO, Na2 O and NO is _____ .

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 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.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.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.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. XeF4 reacts with SbF5 to form [XeFm]n+[SbFy]2− m + n + y + z = ? .

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.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.A solution of CrO5 in amyl alcohol has a....colour (1) Green (2) Orange-Red (3) Yellow (4) Blue

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.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.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

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 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 number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is _____. Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather

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.Given below are two statements: Statement I: During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode. Statement II: During the Hall-Heroult electrolysis process, purified Al2 O3 is mixed with Na3 AlF6 to lower the melting point of the mixture. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is incorrect but Statement II is (2) Both Statement I and Statement II are incorrect correct (3) Statement I is correct but Statement II is (4) Both Statement I and Statement II are correct incorrect

Q50.Given below are two statements: Statement I: In the metallurgy process,sulphide ore is converted to oxide before reduction. Statement II: Oxide ores in general are easier to reduce. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is correct but Statement II is (2) Both Statement I and Statement II are incorrect incorrect (3) Statement I is incorrect but Statement II is (4) Both Statement I and Statement II are correct correct