Practice Questions

Q54.Which is not the correct Statement? (At. nos. Ce = 58, Lu = 71, La = 57, Yb = 70 ) (1) Colour of Yb3+ ion is pink. (2) La3+ is diamagnetic. (3) Ce4+ has f 0 configuration. (4) Lu3+ had f 14 configuration. JEE Main 2012 (07 May Online) JEE Main Previous Year Paper

Q54.Which of the following complex ions will exhibit optical isomerism? (en = 1, 2-diamine ethane). (1) [Cr(NH3)2Cl2]+ (2) [Co(en)2Cl2]+ (3) [Co(NH3)4Cl2]+ (4) [Zn(en)2]2+

Q54.The correct order of ligands in the spectrochemical series is (1) Cl−>en > CN−> NCS− (2) CN−>en > NCS−> Cl− (3) NCS−> CN−> Cl−>en (4) en > CN−> Cl−> NCS−

Q54.The number of unpaired electrons in Gadolinium [Z = 64] is (1) 3 (2) 8 (3) 6 (4) 2

Q54.Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alky halide? (1) Tertiary butyl chloride (2) Neopentane (3) Isohexane (4) Neohexane

Q55.Which of the following statements is wrong? (1) Ethyl chloride on reduction with Zn −Cu couple (2) The reaction of methyl magnesium bromide with and alcohol gives ethane. acetone gives butanol-2. (3) Alkyl halides follow the following reactivity (4) C2H4Cl2 may exist in two isomeric forms sequence on reaction with alkenes. R −I > R −Br > R −Cl > R −I

Q55.How many cyclic structures are possible for C4H6 ? (1) 3 (2) 5 (3) 6 (4) 4

Q55.Which of the following compounds can be detected by Molisch's test ? (1) Nitro compounds (2) Sugars (3) Amines (4) Primary alcohols

Q55.The complex ion [Pt (NO2)(Py) (NH3) (NH2OH)]+ will give (1) 2 isomers (Geometrical) (2) 3 isomers (Geometrical) (3) 6 isomers (Geometrical) (4) 4 isomers (Geometrical)

Q55.Square-planar geometry is shown by (1) [PtCl2(NH3)2] (2) [NiCl4]2− (3) MnO−4 (4) CrO2−4

Q56.The most basic compound among the following is (1) Acetanilide (2) Benzylamine (3) p-Nitro aniline (4) Aniline AgCNQ57. ⟶X Reduction⟶ Y , Here Y is C2H5Br Zn−Rg/HCl (1) Ethyl methyl amine (2) n-propylamine (3) Isopropylamine (4) Ethylamine

Q56.lodoform can be prepared from all except : (1) Ethyl methyl ketone (2) Isopropyl alcohol (3) 3−Methyl −2− butanone (4) Isobutyl alcohol

Q56.The major product obtained in the photobromination of 2-methyl butane is (1) 2-bromo-2-methylbutane (2) 1-bromo-2-methylbutane (3) 1-bromo-3-methylbutane (4) 2-bromo-3-methylbutane

Q56. In the given reaction, the product 'A' is JEE Main 2012 (12 May Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q56.The hydration of propyne results in formation of (1) Acetone (2) Propanol-1 (3) Propene (4) Propanal

Q57.In the given transformation, which of the following is the most appropriate reagent? (1) (−) (2) Zn −Hg/HCl NH2NH2, OH (3) Na , Liq. NH3 (4) NaBH4

Q57.The conversion of benzene diazonium chloride to bromobenzene can be accomplished by (1) Reimer-Tiemann reaction (2) Friedel-Crafts reaction (3) Gattermann reaction (4) Azo-coupling reaction

Q57.The product of the reaction between ethyl benzene and N-bromosuccinamide is (1) (2) (3) (4)

Q57.Tollen's reagent and Fehling solutions are used to distinguish between (1) acids and alcohols (2) alkanes and alcohols (3) ketones and aldehydes (4) n-alkaens and branched alkanes

Q58.The species which can best serve as an initiator for the cationic polymerization is : (1) LiAlH4 (2) HNO3 (3) AlCl3 (4) BuLi

Q58.Which of the following is a polyamide? JEE Main 2012 (19 May Online) JEE Main Previous Year Paper (1) Teflon (2) Orlon (3) Nylon (4) Terylene

Q58.Which one of the following is a chain growth polymerisation? (1) Nucleic acid (2) Polystyrene (3) Protein (4) Starch

Q58.Synthetic polymer bakelite can be prepared from following compounds (1) Styrene and vinyl chloride (2) Acrylonitrile and vinyl chloride (3) Adipic acid and ethylene glycol (4) Phenol and formaldehyde

Q58.Bakelite is obtained from phenol by reacting it with (1) Acetaldehyde (2) Chlorobenzene (3) Formaldehyde (4) Acetamide

Q59.Sulphonamides act as (1) Antiseptic (2) Analgesic (3) Antimicrobials (4) Antipyretic