Practice Questions

Q50.Which of the following xenon-oxo compounds may not be obtained by hydrolysis of xenon fluorides? (1) XeO2 F2 (2) XeOF4 (3) XeO3 (4) XeO4

Q50.For the reaction, 2 N2O5 →4NO2 + O2 , the rate equation can be expressed in two ways −d[N2O5]dt = k [N2O5 ]nnd + d[NO2]dt = k′ [N2O5] k and k′ are related as: (1) k = k′ (2) 2k = k′ (3) k = 2k′ (4) k = 4k′

Q50.Among the following oxoacids, the correct decreasing order of acid strength is : (1) HOCl > HClO2 > HClO3 > HClO4 (2) HClO4 > HOCl > HClO2 > HClO3 (3) HClO4 > HClO3 > HClO2 > HOCl (4) HClO2 > HClO4 > HClO3 > HOCl

Q51.Which one of the following exhibits the large number of oxidation states? (1) Ti(22) (2) V(23) (3) Cr(24) (4) Mn(25)

Q51.The equation which is balanced and represents the correct product(s) is (1) Li2O + 2KCl →2LiCl + K2O (2) [CoCl (NH3)5]+ + 5H+ →Co2+ + 5 NH+4 + Cl− (3)− [Mg (H2O)6]2+ + (EDTA)4−excess NaOH→ [Mg(EDTA)]2+(4) CuSO4+ +6H2O4KCN →K2[Cu (CN)4] + K2 SO4

Q51.An octahedral complex of Co3+ is diamagnetic. The hybridisation involved in the formation of the complex is : (1) dsp2 (2) d2sp3 (3) dsp3d (4) sp3d2

Q51.Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated? (1) IF7 : pentagonal bipyramid (2) BrF5 : trigonal bipyramid (3) BrF3 : planar T-shaped (4) ICI3 : planar dimeric

Q51.Amongst the following, identify the species with an atom in +6 oxidation state. (1) CrO2Cl2 (2) [Cr(CN)6]3− (3) Cr2O3 (4) [MnO4]−

Q52.Allyl phenyl ether can be prepared by heating : (1) CH2 = CH - Br + C6H5 - CH2 - ONa (2) C6H5 - CH = CH - Br + CH3 - ONa (3) CH2 =​ CH - CH2 - Br + C6H5ONa (4) C6H5Br + CH2 = CH - CH2 - ONa

Q52.Which of the following name formula combinations is not correct? (1) K2 [Pt(CN)4] - Potassium tetracyanoplatinate (2) [Mn(CN)5]2− - Pentacyanomagnate (II) ion (II) (3) K [Cr(NH3)2Cl4] - Potassium diammine (4) [Co(NH3)4 (H2O)I]SO4 - Magnetron value. tetrachlorochromate (III)

Q52.The major product formed when 1, 1, 1- trichloropropane is treated with aqueous potassium hydroxide is : (1) 2 - Propanol (2) Propyne (3) Propionic acid (4) 1 - Propanol

Q52.The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is (1) L4 < L3 < L2 < L1 (2) L1 < L3 < L2 < L4 (3) L3 < L2 < L4 < L1 (4) L1 < L2 < L4 < L3

Q52.Copper becomes green when exposed to moist air for a long period. This is due to: (1) the formation of a layer of cupric oxide on the (2) the formation of a layer of basic carbonate of surface of copper. copper on the surface of copper. (3) the formation of a layer of cupric hydroxide on (4) the formation of basic copper sulphate layer on the surface of copper. the surface of the metal. JEE Main 2014 (12 Apr Online) JEE Main Previous Year Paper

Q53.The correct statement for the molecule CsI3 , is : (1) It is a covalent molecule. (2) It contains Cs+ and I−3 ions. (3) It contains Cs3+ and I− ions. (4) It contains Cs+ , I− and lattice I2 molecule.

Q53.Which of the following compounds will not be soluble in sodium bicarbonate? (1) 2, 4, 6 - Trinitrophenol (2) Benzene sulphonic acid (3) o - Nitrophenol (4) Benzoic acid

Q53.Among the following species the one which causes the highest CFSE, Δ0 as a ligand is: (1) CN− (2) NH3 (3) F− (4) CO

Q53.Consider the coordination compound, [Co(NH3)6]Cl3 . In the formation of this complex, the species which acts as the Lewis acid is: (1) [Co(NH3)6]3+ (2) Cl− (3) Co3+ (4) NH3

Q53.For the compounds CH3Cl, CH3Br, CH3I and CH3F, the correct order of increasing C-halogen bond length is : (1) CH3F < CH3Br < CH3Cl < CH3I (2) CH3F < CH3I < CH3Br < CH3Cl (3) CH​3F < CH3Cl < CH3Br < CH3I (4) CH3Cl < CH3Br < CH3F < CH3I JEE Main 2014 (09 Apr Online) JEE Main Previous Year Paper −

Q54.In a nucleophilic substitution reaction : R −Br + Cl−DMF→ R −Cl + Br− , which one of the following undergoes complete inversion of configuration ? (1) C6H5CHC6H5Br (2) C6H5CCH3C6H5Br (3) C6H5CH2Br (4) C6H5CH2CH2Br

Q54.Which one of the following substituents at para-position is most effective in stabilizing the phenoxide ion ? (1) -CH3 (2) -OCH3 (3) -COCH3 (4) -CH2OH

Q54.Chlorobenzne reacts with trichloro acetaldehyde in the presence of H2SO4 . The major product formed is: (1) (2) (3) (4)

Q54.Which one of the following complexes will most likely absorb visible light? (At nos. Sc = 21, Ti = 22, V = 23, Zn = 30 ) (1) [Sc(H2O)6]3+ (2) [Ti(NH3)6]4+ (3) [V(NH3)6]3+ (4) [Zn(NH3)6]2+

Q54.In SN2 reactions, the correct order of reactivity for the following compounds : CH3Cl, CH3CH2Cl, (CH3)2CHCl and (CH3)3CCl is : (1) CH3Cl > (CH3)2CHCl > CH3CH2Cl > (2) CH3Cl > CH3CH2Cl > (CH3)2CHCl > (CH3)3CCl (CH3)3CCl (3) CH3CH2Cl > CH3Cl > (CH3)2CHCl > (4) (CH3)2CHCl > CH3CH2Cl > CH3Cl > (CH3)3CCl (CH3)3CCl

Q55.Williamson synthesis of ether is an example of : (1) Nucleophilic substitution (2) Electrophilic addition (3) Nucleophilic addition (4) Electrophilic substitution

Q55.The most suitable reagent for the conversion of R −CH2 −OH →R −CHO is : (1) KMnO4 (2) K2Cr2O7 (3) CrO3 (4) PCC (Pyridinium Chlorochromate)