841 The preparation of benzene from acetylene can also be said as_________________? Chemistry Medium Full question → A Oxidation B Polymerization C Dehydration D Condensation
842 Benzene is heated in air with V2O5 at 450°C it undergoes________________? Chemistry Medium Full question → A Substitution reaction B Addition reaction C Elimination reaction D Oxidation reaction
844 Benzene does not undergo___________________? Chemistry Medium Full question → A Substitution reaction B Addition reaction C Polymerization reactions D Oxidation reactions
845 Acetophenone is a_____________________? Chemistry Medium Full question → A Ether B Ketone C Aldehyde D Ester
846 Which is fused cyclic aromatic compound _____________________? Chemistry Medium Full question → A diphenyl amine B diphenyl methane C naphthalene D biphenyl
847 Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________? Chemistry Medium Full question → A acetylene B N-hexane C Benzene sulphonic acid D Sodium benzoate
848 Chlorination of toluene in the presence of sublight produces_________________? Chemistry Medium Full question → A Benzyl chloride B o – chlorotoluene C p – chlorotoluene D benzoic acid
849 By which method the molecular mass of benzene was determined as 78.108 ? Chemistry Medium Full question → A Specific gravity method B Vapour density method C X-ray diffraction method D Distillation methos
850 Nitration of chlorobenzene gives___________________? Chemistry Medium Full question → A o – chloronitrobenzene B p – chloronitrobenzene C m – chloronitrobenzene D A & B
851 Aniline is a derivative of benzene which contains__________________? Chemistry Medium Full question → A Imino group B Amino group C Amide group D Nitro group
852 In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________? Chemistry Medium Full question → A Hydrogen B Oxygen C Sulphur D OH
853 The hydrolysis of Benzenetrizonide will yield three moles of____________________? Chemistry Medium Full question → A Glyoxime B Benzaldehyde C Glycol D Glyoxal
854 What is the molecular formula of Benzenetriozonide ? Chemistry Medium Full question → A C6H6O9 B C6H5O8 C C6H5O9 D C6H6O6
855 Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ? Chemistry Medium Full question → A Toluene B Ethyl benzene C n-propyl benzene D All
856 Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________? Chemistry Medium Full question → A Dows process B Friedel & Craft acylation C Friedel & Craft alkylation D Clemmenson reduction
857 Which one of the following statement is not correct about benzene ? Chemistry Medium Full question → A On hydrogenation 208 KJ/mole is liberated B C-H bond length in benzene is 1.09 A? C Molecular mass of benzene is 78.108 D Resonance energy of benzene is 150.5 K Cal/mole
858 Which compound will readily undergo sulphonation ? Chemistry Medium Full question → A Benzene B Nitro benzene C Toluene D Chlorobenzene
859 During sulphonation of benzene H2SO4 generates the electrophile _________________? Chemistry Medium Full question → A HSO4- B SO2 C SO3 D H+
860 Reacting bromine with benzene in the presence of sunlight will result in_______________? Chemistry Medium Full question → A The rupturing of benzene ring B Substitution reaction C Addition reaction D No-reaction