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 Multiple Choice QuestionsMultiple Choice Questions

181.

The commercial production of methanol is done by

  • the catalytic reduction of CO in presence of ZnO, Cr2O3

  • the reaction of water vapour on CH4 at 900°C in presence of nickel catalys

  • the reaction offormaldehyde with LiAlH4

  • reaction of aqua KOH on HCHO


182.

What is the IUPAC name of the follwoing compound?

                       

  • 3-methyl cyclo-1-butene-2-ol

  • 4-methyl cyclobut-2-ene-1-ol

  • 4-methyl cyclobut-1-ene-3-ol

  • 2-methyl cyclo-3-butene-1-ol


183.

Methoxy methane and ethanol are

  • functional isomers

  • chain isomers

  • optical isomers

  • geometrical isomers


184.

When phenol is distilled with Zn dust it gives

  • benzaldehyde

  • benzoic acid

  • toluene

  • benzene


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185.

The compound added to prevent chloroform to form phosgene gas (poisonous gas) is

  • CH3COOH

  • CH3OH

  • CH3COCH3

  • C2H5OH


186.

The reaction C2H5ONa + BrC2H5 → C2H5-O-C2H5 + NaBr is called

  • Frankland reaction

  • Wurtz reaction

  • Williamson's synthesis

  • Cannizaro reaction


187.

Diethyl ether on heating with conc. HI gives two moles of

  • ethyl iodide

  • ethanol

  • iodoform

  • methyl iodide


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188.

Correct acidic order of the following compounds is

                        

  • i > ii> iii

  • iii> i> ii

  • ii> iii> i

  • i> iii> ii


B.

iii> i> ii

Presence of electron withdrawing group such as NO2 CHO etc, on benzene nucleus, makes phenol more acidic by stabilising phenoxde ion while presence of electron releasing groups such as -CH3, -C2H5, destabilises the phenoxide ion, thus makes the phenol less acidic. Hence, the order of acidity of given compounds is

                           


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189.

Identify Z in the following series

C2H5OH PBr3  X alc. KOH Y(ii) H2O, Heat(i) H2SO4 Z

  • CH2 = CH2

  • CH3-CH2OH

  • CH3-CH2-O-CH2-CH3

  • None of the above


190.

The following compounds have identical molecular weight. Which would have the lowest boiling point?

  • 2-butanol

  • 2-methyl-1-propanol

  • 1, 1-dimethyl ethanol

  • 1-methoxypropane


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