Which statement is correct for a pair of enantiomers under the same conditions?

A.  A racemic mixture of the enantiomers is optically active.

B.  They have the same chemical properties in all their reactions.

C.  They have the same melting and boiling points.

D.  They rotate the plane of plane-polarized light by different angles.

Which molecule has an enantiomer?

A.  ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_2{\mathrm{CH}}_3$

B.  ${\mathrm{CH}}_2\left(\mathrm{OH}\right){\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CH}}_2$

C.  ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CH}=\mathrm{CHBr}$

D.  ${\mathrm{CH}}_3{\mathrm{CHBrCH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

Which is correct for the conversion of propanal to propyl methanoate?

What will be the major product in the reaction between but-1-ene and $\mathrm{Hbr}$?

A.  2-bromobut-1-ene

B.  1-bromobut-1-ene

C.  2-bromobutane

D.  1-bromobutane

Which molecule is chiral?

A.     2-chlorobutane

B.     2,2-dichloropentane

C.     Propan-2-amine

D.     4-hydroxybutanoic acid

Which is most likely to hydrolyse via a S_N1 mechanism?

A.  CH₃CHBrCH₂CH₃

B.  (CH₃)₂CHBr

C.  (CH₃)₃CBr

D.  CH₃CH₂CH₂CH₂Br

Which compound rotates the plane of plane-polarized light?

A.  CH₃C(CH₃)ClCH₃

B.  CH₃CH₂CHClCH₃

C.  CH₃C(Cl)₂CH₃

D.  CH₃CClBrCH₃

In which order should the reagents be used to convert benzene into phenylamine (aniline)?

Which compound shows cis-trans isomerism?

A.  CH₃CH=CCl₂

B.  CCl₂=CH₂

C.  

D.  

What is the product of the reaction of benzene with a mixture of concentrated nitric and sulfuric acids?

Which reagents are needed to convert nitrobenzene to phenylamine in 2 steps?

Which molecule contains a chiral carbon?

A.     CH₃CH₂CHBrCH₂CH₃

B.     CH₃CH₂CHBrCH₃

C.     CH₂BrCH(CH₃)CH₂Br

D.     CH₃CH₂CH₂CH₂CH₂Br

Propene is reacted first with hydrogen chloride to produce X which is then reacted with aqueous sodium hydroxide to give Y. Finally, Y is reacted with excess acidified potassium dichromate solution.

$$\text{C}{\text{H}}_{\text{3}}\text{CHC}{\text{H}}_{\text{2}}\stackrel{\text{HCL}}{\to }\text{X}\stackrel{\text{NaOH(aq)}}{\to }\text{Y}\stackrel{{\text{H}}^{+}/\text{C}{\text{r}}_2{{\text{O}}_7}^{2-}\text{(aq)}}{\to }\text{Z}$$

What is the major product, Z? 

A.     CH₃CH(OH)CH₃

B.     CH₃COCH₃

C.     CH₃CH₂CHO

D.     CH₃(CH₂)₂COOH

Which statement is correct about configurational isomers?

A.  Configurational isomers can only be interconverted by breaking and reforming bonds.

B.  Configurational isomers have different molecular formulas but the same structural formulas.

C.  Configurational isomers are not distinct compounds.

D.  Configurational isomers always have identical physical properties.

Which is the correct combination of substitution reaction mechanisms?

Which product is formed when CH₃COCH₂CH₃ is reduced with sodium borohydride?

A.  CH₃CH₂CH₂CHO

B.  CH₃CH₂CH₂CH₂OH

C.  CH₃CH(OH)CH₂CH₃

D.  CH₃CH₂CH₂COOH

What is the major product of the reaction of HBr with but-1-ene?

A.   1-bromobutane

B.   2-bromobutane

C.   1,2-dibromobutane

D.   2,2-dibromobutane

Which statement about the reaction of a hydroxide ion with the organic reagent is correct?

A.   1-bromopentane predominantly follows an S_N1 mechanism.

B.   2-bromo-2-methylbutane predominantly follows an S_N2 mechanism.

C.   Reaction with 1-bromopentane occurs at a slower rate than with 1-chloropentane.

D.   Reaction with 1-bromopentane occurs at a slower rate than with 2-bromo-2-methylbutane.

What is the product of the reaction of propanal with lithium aluminium hydride, LiAlH₄?

A.  Propanoic acid

B.  Propanone

C.  Propan-1-ol

D.  Propan-2-ol

Which attacking species is matched with its mechanism of reaction?

What are the E/Z designations of these stereoisomers?

Which is a major product of the electrophilic addition of hydrogen chloride to propene?

A. ClCH₂CH=CH₂

B. CH₃CH(Cl)CH₃

C. CH₃CH₂CH₂Cl

D. CH₃CH=CHCl

Which class of compound is formed when a ketone is reduced?

A. primary alcohol

B. secondary alcohol

C. ether

D. carboxylic acid

Which compound exists as two configurational isomers?

A. CBr₂=CH₂

B. CH₂=CHBr

C. CHBr₂CH₂Br

D. CHBr=CHBr

Which can show optical activity?

A.  CHBrCHCl

B.  CH₃CH₂CHBrCH₂CH₃

C.  (CH₃)₂CBrCl

D.  CH₃CH₂CH(CH₃)Br

Which pair of isomers always shows optical activity?

A.     Cis-trans

B.     Enantiomers

C.     Conformational

D.     E/Z

Which can be reduced to an aldehyde?

A. Butanone

B. Butan-1-ol

C. Butanoic acid

D. Butan-2-ol

Which isomers exist as non-superimposable mirror images?

A.     cis-trans isomers

B.     diastereomers

C.     enantiomers

D.     structural isomers

What is name of this compound applying IUPAC rules?

A.     E 1-bromo-1-chlorobut-1-ene

B.     Z 1-bromo-1-chlorobut-1-ene

C.     E 1-bromo-1-chloro-2-ethylethene

D.     Z 1-bromo-1-chloro-2-ethylethene

Propene reacts separately with H₂O/H⁺ and H₂/Ni to give products X and Z respectively. 

What are the major products of the reactions?

What is the product of the reaction between pentan-2-one and sodium borohydride, NaBH₄?

A. Pentan-1-ol

B. Pentan-2-ol

C. Pentanoic acid

D. Pentanal

Which is the electrophile in the nitration of benzene?

A.  ${\mathrm{HNO}}_3$

B.  ${{\mathrm{NO}}_2}^{+}$

C.  ${{\mathrm{NO}}_2}^{-}$

D.  ${{\mathrm{NH}}_4}^{+}$

What is molecule Z that is formed in step 1 of this synthetic route?

What is the product of the reduction of 2-methylbutanal?

A.     2-methylbutan-1-ol

B.     2-methylbutan-2-ol

C.     3-methylbutan-2-one

D.     2-methylbutanoic acid

Which solvent is aprotic?

A. H₂O

B. C₆H₅CH₃

C. CH₃OH

D. CH₃NH₂

What is the number of optical isomers of isoleucine?

A. 0

B. 2

C. 4

D. 8

How many chiral centres are there in the following molecule?

A.  2

B.  3

C.  4

D.  6

Which sequence of reagents converts propene to propanone?

Which compound can exist as cis- and trans-isomers?

In which compound is the halogen substituted the most rapidly by aqueous hydroxide ions?

A. (CH₃)₃CCl

B. (CH₃)₃CI

C. CH₃CH₂CH₂CH₂Cl

D. CH₃CH₂CH₂CH₂I

How many chiral carbon atoms are present in one molecule of (CH₃)₂CHCHClCHBrCH₃?

A.   0

B.   1

C.   2

D.   3

Which statement is not correct regarding benzene?

A. It is planar.

B. The ring contains delocalized electrons.

C. It always reacts in the same way as alkenes.

D. The carbon–carbon bond has a bond order of 1.5.

What are the type of reaction and role of the nitronium ion, NO₂⁺, in the following reaction?

C₆H₆ + NO₂⁺ → C₆H₅NO₂ + H⁺