Practice Questions

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

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 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

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.The correct order of melting point of dichlorobenzenes is (1) (2) (3) (4)

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.The correct order of the number of unpaired electrons in the given complexes is (A) [Fe ( CN ) 3 - 6] (B) FeF6 3 - (C) CoF6 3 - (D) Cr ( oxalate 3 - ) 3 (E) Ni ( CO ) 4 Choose the correct answer from the options given below: (1) E < A < D < C < B (2) E < A < B < D < C (3) A < E, C < B < D (4) A < E < D < C < B

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

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 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.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.The set which does not have ambidentate ligand(s) is (1) C2O42 - , ethylene diammine, H2O (2) EDTA 4 - , NCS-, C2O42 - (3) NO2- , C2O42 - , EDTA 4- (4) C2O42 - , NO2- , NCS-

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. (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 radical which mainly causes ozone depletion in the presence of UV radiations is : (1) Cl⋅ (2) NO⋅ ⋅ ⋅ (3) OH (4) CH 3

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.The major product formed in the Friedel-Craft acylation of chlorobenzene is (1) (2) (3) (4) Q46. ‘ A’ formed in the above reaction is (1) (2) (3) (4)

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

Q46.In the following given reaction 'A' is JEE Main 2023 (24 Jan Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q46.Decreasing order of dehydration of the following alcohols is (1) a > d > b > c (2) b > d > c > a (3) b > a > d > c (4) d > b > c > a

Q46.The major products A and B from the following reactions are : (1) (2) (3) (4)

Q46.Identify the correct order of reactivity for the following pairs towards the respective mechanism (A) (B) (C) Electrophilic substitution (D) Nucleophilic substitution Choose the correction answer from the options given below: (1) B, C and D only (2) A, B, C and D (3) A, B and D only (4) A, C and Donly

Q46.Benzyl isocyanide can be obtained by: (A) (B) (C) (D) Choose the correct answer from the options given below: JEE Main 2023 (30 Jan Shift 1) JEE Main Previous Year Paper (1) A and D (2) Only B (3) A and B (4) B and C

Q46.The number of given statement/s which is/are correct is_____ (A) The stronger the temperature dependence of the rate constant, the higher is the activation energy. (B) If a reaction has zero activation energy, its rate is independent of temperature. (C) The stronger the temperature dependence of the rate constant, the smaller is the activation energy. (D) If there is no correlation between the temperature and the rate constant then it means that the reaction has negative activation energy.