Practice Questions

Q42.Which one of the lanthanoids given below is the most stable in divalent form? (1) Yb (Atomic Number 70) (2) Sm (Atomic Number 62) (3) Eu (Atomic Number 63) (4) Ce (Atomic Number 58)

Q42.The most stable trihalide of nitrogen is. (1) NF3 (2) NCl3 (3) NBr3 (4) NI3

Q42.Match List I with List II. List I With Ore List II Composition A.Siderite I. FeCO3 B.Malachite II. CuCO3 ⋅Cu(OH)2 C.Sphalerite III. ZnS D.Calamine IV. ZnCO3 Choose the correct answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-III, B-IV, C-E, D-I (3) A-IV, B-III, C-I, D-II (4) A-I, B-II, C-IV, D-III

Q43.Which of the following chemical reactions represents Hall-Heroult Process? (1) Cr2 O3 + 2Al →Al2 O3 + 2 Cr (2) 2 Al2 O3 + 3C →4Al + 3 CO2 (3) FeO + CO →Fe + CO2 (4) 2[Au (CN)2]−(aq) + Zn(s) →2 Au(s) + [Zn(CN4)]2−

Q43.Refining using liquation method is the most suitable for metals with (1) Low melting point (2) High boiling point (3) High electrical conductivity (4) Less tendency to be soluble in melts than impurities

Q43.Given below are two statements. Statement I : Pig iron is obtained by heating cast iron with scrap iron. Statement II : Pig iron has a relatively lower carbon content than that of cast iron. In the light of the above statements, choose the correct answer from the options given below. (1) Both Statement I and Statement II are correct. (2) Both Statement I and Statement II are not correct. (3) Statement I is correct but Statement II is not (4) Statement I is not correct but Statement II is correct correct.

Q43.Match List-I with List-II List-I List-II (Complex) (Hybridization) A Ni (CO)4 I sp3 B [Ni (CN)4]2− II sp3 d2 C [Co (CN)6]3− III d2 sp3 D [CoF6]3− IV dsp2 Choose the correct answer from the options given below (1) A −IV, B −I, C −III, D −II (2) A −I, B −IV, C −III, D −II (3) A −I, B −IV, C −II, D −III (4) A −IV, B −I, C −II, D −III

Q43.In the given reaction 'A' can be (1) benzyl bromide (2) bromobenzene (3) cyclohexyl bromide (4) methyl bromide

Q43.The metal that is not extracted from its sulphide ore is (1) Aluminium (2) Iron (3) Lead (4) Zinc

Q43. Fe3+ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of (1) [Fe (H2O)6]2[Fe (CN)6] (2) Fe2 [Fe (CN)6]2 (3) Fe3 [Fe (OH)2(CN)4]2 (4) Fe4 [Fe (CN)6]3

Q43.Which one of the following elemental forms is not present in the enamel of the teeth? (1) Ca2+ (2) P3+ (3) F− (4) P5+

Q43.Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula? (1) Pyrophosphorous acid (2) Hypophosphoric acid (3) Phosphoric acid (4) Pyrophosphoric acid

Q43.Toluene can be easily converted into benzaldehyde by which of the following reagents? (1) CrO3 /acetic acid, H3O+ (2) CrO3 /acetic anhydride, H3O+ (3) KMnO4 / HCl, H3O+ (4) CO, HCl, Anhyd. AlCl3

Q43.Which of the following oxoacids of sulphur contains "S" in two different oxidation states? (1) H2S2O3 (2) H2S2O6 (3) H2S2O7 (4) H2S2O8

Q43.Which of the reaction is suitable for concentrating ore by leaching process? (1) 2Cu2 S + 3O2 →2Cu2O + 2SO2 (2) Fe3O4 + CO →3FeO + CO2 (3) Al2O3 + 2NaOH + 3H2O →2NaAlOH4 (4) Al2O3 + 6Mg →6MgO + 4Al

Q43.Which of the following will have maximum stabilization due to crystal field? (1) [Ti (H2O)6]3+ (2) [Co (H2O)6]2+ (3) [Co (CN)6]3− (4) [Cu (NH3)4]2+

Q43.Dinitrogen is a robust compound, but reacts at hig altitude to form oxides. The oxide of nitrogen the can damage plant leaves and retard photosynthes is (1) NO (2) NO3- (3) NO2 (4) NO2-

Q43.The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P −H bonds, is (1) Phosphonic acid (2) Phosphinic acid (3) Hypophosphoric acid (4) Pyrophosphorus acid

Q43.The ' f ' orbitals are half and completely filled, respectively in lanthanide ions [Given : Atomic no. Eu, 63 : Sm, 62 : Tm, 69; Tb, 65; Yb, 70; Dy, 66] (1) Eu2+ and Tm2+ (2) Sm2+ and Tm3+ (3) Tb4+ and Yb2+ (4) Dy3+ and Yb3+

Q43.Among the following, which is the strongest oxidizing agent? (1) Mn3 + (2) Ti3 + (3) Fe3 + (4) Cr3 +

Q43.Polar stratospheric clouds facilitate the formation of (1) ClONO2 (2) HOCl (3) ClO (4) CH4

Q43. Considering the above reactions, the compound ' A ' and compound ' B ' respectively are (1) (2) (3) (4) JEE Main 2022 (29 Jul Shift 1) JEE Main Previous Year Paper

Q43.The interhalogen compound formed from the reaction of bromine with excess of fluorine is a (1) hypohalite (2) halate (3) perhalate (4) halite

Q43.Given below are two statements : JEE Main 2022 (28 Jun Shift 1) JEE Main Previous Year Paper Statement I: [Ni (CN)4]2− is square planar and diamagnetic complex, with dsp2 hybridization for Ni but [Ni (CO)4] is tetrahedral, paramagnetic and with sp3 hybridication for Ni. Statement II : [NiCl4]2− and [Ni (CO)4] both have same d-electron configuration, have same geometry and are paramagnetic. In light the above statements, choose the correct answer form the options given below (1) Both Statement I and Statement II are true. (2) Statement I is correct but statement II is false. (3) Statement I is incorrect but statement II is true. (4) Both Statement I and Statement II are false.

Q43.Given below are two statements . Statement I : In CuSO4 ⋅5H2O, Cu −O bonds are present. Statement II : In CuSO4. 5H2O, ligands coordinating with Cu (II) ion are O-and S-based ligands. In the light of the above statements, choose the correct answer from the options given below JEE Main 2022 (29 Jun Shift 2) JEE Main Previous Year Paper (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect correct