Halogen Containing Organic Compounds

• Which C-X bond has the highest bond energy per mole? a) C-Br b) C-Cl c) C-F d) C-I

• Which alkyl halide has the highest reactivity for a particular alkyl group? a) R-F b) R-Cl c) R-I d) R-Br

• When ethyl chloride reacts with nascent hydrogen, what is the formed product? a) Methane b) Propane c) Butane d) Ethane

• Which of the following halide can give best SN2 reaction? a) Primary alkyl halide b) Tertiary alkyl halide c) Secondary alkyl halide d) All can give SN2 reaction at same rate

• Which alkyl halide out of the following may follow both SN1 and SN2 mechanism? a) CH3-X b) (CH3)2CH-X c) (CH3)3C-X d) (CH3)3C-CH2-X

• When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed? a) 2 moles of ethane b) 1 moles of ethane c) 2 moles of butane d) 1 moles of butane

• The molecular formula of DDT has how many chlorine atoms? a) 5 chlorine atoms b) 2 chlorine atoms c) 3 chlorine atoms d) 4 chlorine atoms

• In primary alkyl halides, carbon attached to the halogen atom is further attached to how many carbon atoms? a) 1 b) 2 c) 3 d) 4

• Which of the following is not the method of preparation of alkyl halide? a) Darzen’s method b) Halogenation of alkene c) Addition of HX on alkenes d) Hydration of alkene

• Why alkyl halides are considered to be very reactive compounds towards nucleophile? a) they have an electrophilic carbon & a bad leaving group b) they have a nucleophilic carbon & a good leaving group c) they have an electrophilic carbon d) they have an electrophilic carbon & a good leaving group

• Which of the following is the commercial method of preparation of Chlorobenzene? a) Raschig process b) Wurtz Fitting reaction c) Friedel-Crafts reaction d) Grignard reaction

• Which of the following reactant gives the best method of preparation of alkyl halides when reacts with alcohol? a) Zn/HCl b) PCl5 c) SOCl2/ Pyridine d) PCl3

• Which of the following is true about chlorobenzene? a) Chlorobenzene is less reactive than benzyl chloride b) Chlorobenzene is more reactive than ethyl bromide c) Chlorobenzene is nearly as reactive as methyl chloride d) Chlorobenzene is more reactive than isopropyl chloride

• What will be the product for the given reaction? a) CCl3CHO b) C6H6Cl6 c) C6H12Cl6 d) C6H9Cl2

• Benzene reacts with chlorine to form benzene hexachloride in presence of which of the following reactant? a) Nickel b) AlCl3 c) Bright sunlight d) Zinc

• What is the IUPAC name of chloroform? a) Dichloromethane b) Trichloromethane c) Chloromethane d) Carbon tetrachloride

• Which among the following is true? a) Freon does not initiate radical chain reactions in stratosphere b) Iodoform initiates radical chain reactions in stratosphere c) Freon initiates radical chain reactions in stratosphere d) Chloroform initiates radical chain reactions in stratosphere

• Central nervous system can be depressed by the use of which of the following: a) Chloroform b) Freon c) Iodoform d) DDT

• CFxCly [where x + y = 4], why these compounds are not used? a) These are fluoro carbons b) These are difficult to synthesise c) They deplete ozone layer d) These are very expensive

• Which one of the following is the correct formula of methylene dichloride? a) ClCH = CHCl b) ClC ≡ CCl c) CH2Cl2 d) CH2(Cl) CH2Cl

• How Benzene hexachloride (BHC) is used? a) Insecticides b) Fertilizers c) Anaesthetics d) Antiseptics

• Which is the correct formula of Freon-12? a) CCl2F2 b) CClF3 c) CHCl2F d) CCl3F

• Depletion of Ozone is believed to increase which of the following? a) Population b) Ultraviolet rays c) Pollution d) Greenery

• Which of the following compounds does not give a tertiary alcohol upon reaction with methylmagnesium bromide? a) 3-methylpentanal b) Ethyl benzoate c) 4,4-dimethylcyclohexanone d) 4-heptanone