Practice Questions

Q52.Which of the following is wrong statement? (1) Ozone is violet-black in solid state (2) Ozone is diamagnetic gas (3) ONCl and ONO- are isoelectronic (4) O3 molecule is bent

Q52.Identify the incorrect statement: (1) In (Si3O9)6− , tetrahedral SiO4 units share two (2) Trialkylchlorosilane on hydrolysis gives R3SiOH oxygen atoms. . (3) SiCl4 undergoes hydrolysis to give H4SiO4 . (4) (Si3O9)6− has cyclic structure.

Q53.The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds : (1) 3d54s2 (2) 3d84s2 (3) 3d74s2 (4) 3d64s2

Q53.The order of reactivity of the given haloalkanes towards nucleophile is : (1) RI > RBr > RCl (2) RCl > RBr > RI (3) RBr > RCl > RI (4) RBr > RI > RCl

Q53.Which of the following statements is incorrect? (1) Fe2+ ion also gives blood red colour with SCN− (2) Fe3+ ion also gives blood red colour with SCN− ion. ion. (3) On passing H2 S into Na2ZnO2 solution a white (4) Cupric ion reacts with excess of ammonia ppt of ZnS is formed. solution to give deep blue colour of [Cu(NH3)4]2+ ion.

Q53. The major product in the following reaction (1) (2) (3) (4)

Q53.Which of the following arrangements does not represent the correct order of the property stated against it? (1) Co3+ < Fe3+ < Cr3+ < Sc3+ :​ Stability in aqueous (2) Sc < Ti < Cr < Mn :​ Number of oxidation states solution (3) V2+< Cr2+ < Mn2+ < Fe2+:​ Paramagnetic (4) Ni2+ < Co2+ < Fe2+ < Mn2+ :​ Ionic size behaviour

Q54.Type of isomerism which exists between [Pd(C6H5)2(SCN)2] and [Pd(C6H5)2(NCS)2] is : (1) Linkage isomerism (2) Coordination isomerism (3) Ionisation isomerism (4) Solvate isomerism

Q54.The Wurtz-Fittig reaction involves condensation of: (1) two molecules of aryl halides (2) one molecule of each of aryl-halide and alkyl- halide. (3) one molecule of each of aryl-halide and phenol. (4) two molecules of aralkyl-halides.

Q54.Cannizaro's reaction is not given by : JEE Main 2013 (25 Apr Online) JEE Main Previous Year Paper (1) (2) (3) CH3CHO (4) HCHO

Q54.Given Eo = −0. 74 V; Eo = 1. 51 V Cr3+/Cr MnO−4 /Mn2+ Eo = 1.33 V; Eo Cl2 Cl−= 1. 36 V Cr2O2−7 /Cr3+ Based on the data given above, strongest oxidising agent will be: (1) Mn2+ (2) MnO−4 (3) Cl− (4) Cr3+

Q54.The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as : (1) Claisen reaction (2) Schotten-Baumann reaction (3) Reimer-Tiemann reaction (4) Gatterman-Koch reaction

Q55.Which of the following is the product of aldol condensation? (1) (2) (3) (4)

Q55. X is: JEE Main 2013 (09 Apr Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q55.Phenol on heating with CHCl3 and NaOH gives salicylaldehyde. The reaction is called: (1) Reimer - Tiemann reaction (2) Claisen reaction (3) Cannizzaro's reaction (4) Hell - Volhard - Zelinsky reaction

Q55.What is the structure of the major product when phenol is treated with bromine water? (1) (2) (3) (4)

Q55.Which of the following complex species is not expected to exhibit optical isomerism? (1) [Co(NH3)3Cl3] (2) [Co(en)(NH3)2Cl2]+ (3) [Co(en)3]3+ (4) [Co(en)2Cl2]+

Q56.An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism: (1) Secondary alcohol by SN2 (2) Tertiary alcohol by SN2 (3) Secondary alcohol by SN1 (4) Tertiary alcohol by SN1

Q56.Amongst the following alcohols which would react fastest with conc. HCl and ZnCl2 ? (1) pentanol (2) 2-methyl butanol (3) 2-pentanol (4) 2-methyl butan-2-ol JEE Main 2013 (22 Apr Online) JEE Main Previous Year Paper

Q56.Aryl fluoride may be prepared from arene diazonium chloride using : (1) HBF4/Δ (2) HBF4/NaNO2, Cu, Δ (3) CuF/HF (4) Cu/HF 0

Q56.The order of basicity of amines in gaseous state is : (1) 1∘> 2∘> 3∘> NH3 (2) 3∘> 2∘> NH3 > 1∘ (3) 3∘> 2∘> 1∘> NH3 (4) NH3 > 1∘> 2∘> 3∘

Q56.Which of the following reagent(s) used for the conversion? (1) glycol/ LiAlH4/H3O+ (2) glycol/ NaH/H3O+ (3) LiAlH4 (4) NaBH4

Q57.Which of the following polymer is a polyamide ? (1) Terylene (2) Nylon (3) Rubber (4) Vulcanised rubber

Q57.Carbylamine forms from aliphatic or aromatic primary amine via which of the following intermediates? (1) Carbanion (2) Carbene (3) Carbocation (4) Carbon radical

Q57.Compound (A), C8H9 Cl, gives a white precipitate when warmed with alcoholic AgNO3 . Oxidation of (A) gives an acid (B), C8H6O4 . (B) easily forms anhydride on heating. Identify the compound (A). JEE Main 2013 (07 Apr) JEE Main Previous Year Paper (1) (2) ​ ​ (3) (4) ​ ​