Practice Questions

Q44.The primary and secondary valencies of cobalt respectively in Co ( NH3 ) 5ClCl2 are: (1) 3 and 5 (2) 2 and 6 (3) 2 and 8 (4) 3 and 6

Q44.In the following reaction ‵X′ is Anhy.AlCl3 −CH3 (CH2)4 CH3 → X HCl major product △ (1) (2) (3) CH3 (CH2)4 CH2 Cl (4) Cl −CH2 −(CH2)4 −CH2 −Cl

Q44.Match List-I with List-II. Choose the correct answer from the options given below: (1) A-II, B-IV, C-I, D-III (2) A-IV, B-I, C-III, D-II (3) A-IV, B-I, C-II, D-III (4) A-II, B-IV, C-III, D-I

Q44.The major product formed in the following reaction is A. B. JEE Main 2023 (11 Apr Shift 2) JEE Main Previous Year Paper C. D. choose the correct answer from the options Given below: (1) B only (2) A only (3) C only (4) D only

Q44.Match List I with List II. List I List II A.van't Hoff I. Cryoscopic constant factor, i B. kf II. Isotonic solutions Solutions with same C. III. Normal molar mass osmotic pressure Abnormal molar mas Solutions with same composition D.Azeotropes IV. of vapour above it Choose the correct answer from the options given below: (1) A-III, B-I, C-II, D-IV (2) A-III, B-II, C-I, D-IV (3) A-III, B-I, C-IV, D-II (4) A-I, B-III, C-II, D-IV

Q44.The complex that dissolves in water is (1) NH43AsMo3O104 (2) Fe4Fe ( CN ) 63 (3) K3CoNO26 (4) Fe3 ( OH ) 2 ( OAc ) 6Cl

Q44.The industrial activity held least responsible for global warming is : (1) manufacturing of cement (2) steel manufacturing (3) Electricity generation in thermal power plants. (4) Industrial production of urea

Q45.Correct statement about smog is (1) NO2 is present in classical smog (2) Both NO2 and SO2 are present in classical smog (3) Photochemical smog has high concentration of (4) Classical smog also has high concentration of oxidizing agents oxidizing agents

Q45.The reaction occurs in which of the given galvanic cell? 1 2 H2( g) + AgCl(s) ⇌H+(aq) + Cl−(aq) + Ag(s) (1) Pt |H2(g)| HCl(soln )| AgCl(s)| Ag (2) Ag | AgCl(s)| KCl(soln )| AgNO3 | Ag (3) Pt |H2(g)| HCl(soln )| AgNO3(soln )| Ag (4) Pt |H2(g)| KCl(soln )| AgCl(s)| Ag

Q45.Iron oxide FeO, crystallises in a cubic lattice with a unit cell edge length of 5. 0Å . If density of the FeO in the crystal is 4. 0 g cm−3 , then the number of FeO units present per unit cell is _____ (Nearest integer) Given : Molar mass of Fe and O is 56 and 16 g mol−1 respectively. NA = 6. 0 × 1023 mol−1

Q45.The correct IUPAC nomenclature for the following compound is: (1) 2 -Methyl- 5 -oxohexanoic acid (2) 2 -Formyl- 5 -methylhexan- 6 -oic acid (3) 5 -Methyl- 2 -oxohexan- 6 -oic acid (4) 5 -Formyl- 2 -methylhexanoic acid

Q45.Which of the following complexes will exhibit maximum attraction to an applied magnetic field? (1) [Ni ( H2O ) 6] 2 + (2) [Co ( en ) 3] 3 + (3) [Zn ( H2O ) 6] 2 + (4) [Co ( H2O ) 6] 2 +

Q45. Pt (s)H2( g)(1 bar)|H+(aq)(1M)| M3+(aq), M+(aq) Pt(s) The Ecell for the given cell is 0. 1115 V at 298 K [M+(aq)] When = 10a [M3+(aq)] The value of a is ___________ Given : Eθ M3+/M+= 0. 2 V 2.303 RT = 0. 059 V F

Q45.Which of the following compounds would give the following set of qualitative analysis? (i) Fehling’s Test: Positive (ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue. (1) (2) (3) (4)

Q45. (i) O3 −2 −hexene → Products (ii) H2O The two products formed in above reaction are (1) Butanal and acetaldehyde (2) Butanoic acid and acetaldehyde (3) Butanal and acetic acid (4) Butanoic acid and acetic acid

Q45.The octahedral diamagnetic low spin complex among the following is (1) CoNH36 3 + (2) CoF6 3 - (3) CoCl6 3 - (4) NiCl4 2

Q45.A metal M crystallizes into two lattices :- face centred cubic (fcc) and body centred cubic (bcc) with unit cell edge length of 2. 0 and 2. 5 °A respectively. The ratio of densities of lattices fcc to bec for the metal M is _______(Nearest integer) Q46. 20% of acetic acid is dissociated when its 5 g is added to 500 mL of water. The depression in freezing point of such water is _____ × 10−3∘C. Atomic mass of C, H and O are 12, 1 and 16 a.m.u. respectively. [Given : Molal depression constant and density of water are 1. 86 K kg mol−1 and 1 g cm−3 respectively. Q47. 1 × 10−5 M AgNO3 is added to 1 L of saturated solution of AgBr. The conductivity of this solution at 298 K is _______ × 10−8 S m−1 . [Given : Ksp(AgBr) = 4. 9 × 10−13 at 298 K λ0 = 6 × 10−3 Sm2 mol−1 Ag+ JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper λ0Br−= 8 × 10−3 Sm2 mol−1 λ0 = 7 × 10−3 Sm2 mol−1] NO−3

Q45.The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are 0. 7 and 0. 3 respectively. The Total pressure becomes 410 mm Hg if the mole fractions are changed to 0. 2 and 0. 8 respectively for A and B . The vapour pressure of pure A is ______ mm Hg . (Nearest integer) Consider the liquids and solutions behave ideally

Q45.For the reaction Acetone RCH2Br + I- ⟶ RCH2I + Br- major The correct statement is (1) Br– can act as competing nucleophile. (2) The reaction can occur in acetic acid also. (3) The transition state formed in the above reaction (4) The solvent used in the reaction solvates the ions is less polar than the localised anion. formed in rate determining step

Q45.Number of crystal systems from the following where body centred unit cell can be found, is _____. Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic

Q45.Which of the following compounds is an example of Freon? (1) C2H2 F2 (2) C2 F4 (3) C2 HF3 (4) C2 Cl2 F2

Q45.The equilibrium constant for the reaction Zn(s) + Sn2+(aq) ⇌Zn2+(aq) + Sn(s) is 1 × 1020 at 298 K . The magnitude of standard electrode potential of Sn / Sn2+ if E0 = −0. 76 V is _____ ×10−2 V . (Nearest Zn2* / Zn integer) Given : 2.303 RT = 0. 059 V F

Q45.The normal rain water is slightly acidic and its pH value is 5. 6 because of which one of the following ? (1) CO2 + H2O →H2 CO3 (2) N2O5 + H2O →2 HNO3 (3) 2 SO2 + O2 + 2H2O →2H2 SO4 (4) 4 NO2 + O2 + 2H2O →4 HNO3

Q45.Identify the incorrect option from the following: JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q45.Assertion A: Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of hydrolysis increases. Reason R: I- is a good nucleophile as well as a good leaving group. 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) A is true but R is false (3) Both A and R are true and R is the correct (4) Both A and R are true and R is not the correct explanation of A explanation of A