Practice Questions

Q41.The increasing order of the boiling points of the major products A, B and C of the following reactions will be : (a) (b) (c) (1) B < C < A (2) C < A < B (3) A < B < C (4) A < C < B JEE Main 2020 (06 Sep Shift 2) JEE Main Previous Year Paper

Q41.For the following reactions where, ks and ke , are respectively, the rate constants for substitution and elimination, and μ = ks , the correct option ke is ________ (1) μB > μA and ke(A) > ke(B) (2) μA > μB and ke(B) > ke(A) (3) μB > μA and ke(B) > ke(A) (4) μA > μB and ke(A) > ke(B)

Q41.In the following reaction A is (1) (2) (3) (4)

Q42.The complex that can show optical activity is : (1) trans −[Cr (Cl2)(Ox)2]3− (2) trans −[Fe (NH3)2(CN)4]− (3) cis −[Fe (NH3)2(CN)4]− (4) cis −[CrCl2 (ox)2]3−(ox = oxalate)

Q42.For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements : (I) both the complexes can be high spin. (II) Ni(II) complex can very rarely be of low spin. (III) with strong field ligands, Mn(II) complexes can be low spin. (IV) aqueous solution of Mn(II) ions is yellow in color. The correct statements are : (1) (I) and (II) only (2) (I), (II) and (IV) only (3) (I), (II) and (III) only (4) (II), (III) and (IV) only

Q42.The major product [B] in the following sequence of reactions is: (1) (2) (3) (4)

Q42.Consider the following reactions, The compound [P] is: (1) (2) (3) (4) JEE Main 2020 (09 Jan Shift 2) JEE Main Previous Year Paper

Q42.Consider the reaction sequence given below : Which of the following statements is true: (1) Changing the base from OH⊖ to ⊖OR will have no effect on reaction (2) (2) Changing the concentration of base will have no effect on reaction (1) (3) Doubling the concentration of base will double the rate of both the reactions (4) Changing the concentration of base will have no effect on reaction (2)

Q42.Consider the complex ions, trans- [Co(en)2 Cl2]*(A) and statement regarding them is : (1) both (A) and (B) cannot be optically active. (2) (A) can be optically active, but (B) cannot be optically active. (3) both (A) and (B) can be optically active. (4) (A) cannot be optically active, but (B) can be optically active.

Q42.The major product [R] in the following sequence of reaction is : (1) (2) (3) (4)

Q42.The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : Item-I Item-II (I) Benzene (P) HCl and SnCl2, H3O+ (II) Benzonitrile (Q) H2, Pd −BaSO4, S and quinoline (III) Benzoyl Chloride (R) Co, HCl and AlCl3 (1) (I)-(Q), (II)-(R) and (III)-(P) (2) (I)-(P), (II)-(Q) and (III)-(R) (3) (I)-(R), (II)-(P) and (III)-(Q) (4) (I)-(R), (II)-(Q) and (III)-(P)

Q42.The lanthanoid that does NOT show + 4 oxidation state is: (1) Dy (2) Ce (3) Eu (4) Tb

Q42.Which of these will produce the highest yield Friedel Crafts reaction? (1) (2) (3) (4)

Q42.The major product of the following reaction is: (1) (2) (3) (4)

Q42.Consider the following reactions: Which of these reactions are possible? JEE Main 2020 (07 Jan Shift 2) JEE Main Previous Year Paper (1) (a) and (b) (2) (a) and (d) (3) (b), (c) and (d) (4) (b) and (d)

Q43.What is the product of following reaction? ? (1) (2) (3) (4)

Q43.Which of the following compounds can be prepared in good yield by Gabriel phthalimide synthesis ? (1) (2) CH3 −CH2 −NHCH3 (3) (4)

Q43.The mechanism of Sn1 reaction is given as: Y⊖ R −X ⟶R⊕X⊖⟶R⊕ X⊖ →R −Y + X⊖ lon pair Solvent Speparated ion pair A student writes general characteristics based on the given mechanism as : (a) The reaction is favoured by weak nucleophiles. (b) R⊕ would be easily formed if the substituents are bulky y (c) The reaction is accompanied by recemization (d) The reaction is favoured by non-polar solvents. Which observations are correct? (1) (a) and (b) (2) (a) and (c) (3) (a), (b) and (c) (4) (b) and (d)

Q43.Which of the following compounds will show retention in configuration on nucleophile substitution by OH−ion ? JEE Main 2020 (02 Sep Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q43.The increasing order of basicity of the following compounds is : (1) (A) < (B) < (C) < (D) (2) (B) < (A) < (D) < (C) (3) (D) < (A) < (B) < (C) (4) (B) < (A) < (C) < (D)

Q43.Identify (A) in the following reaction sequence: (1) (2) (3) (4) JEE Main 2020 (09 Jan Shift 1) JEE Main Previous Year Paper

Q43.In the following reaction sequence, structures of A and B are, respectively (1) (2) (3) (4)

Q43.The major product of the following reaction is : JEE Main 2020 (05 Sep Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q43.The decreasing order of basicity of the following amines is: (1) (I) > (III) > (IV) > (II) (2) (III) > (I) > (II) > (IV) (3) (II) > (III) > (IV) > (I) (4) (III) > (II) > (I) > (IV)

Q43.The most suitable reagent for the given conversion is: (1) B2H6 (2) NaBH4 (3) LiAlH4 (4) H2/Pd