SL Topic 10 Organic Chemistry (1) (SL)

1 Dr Geoffrey Neuss, InThinking

http://www.thinkib.net/chemistry

SL Topic 10 : Organic chemistry (First test)

For each question choose the answer you consider to be the best.

1. What is the IUPAC name of the following hydrocarbon?

A. hexane

B. 2-methylpentane

C. 2,2-dimethylbutane

D. ethylbutane

2. Which is the correct formula for 2-bromo-3-methylbutane?

A. CH3CBr2CH(CH3)CH3

B. CH3CHBrCH2CH(CH3)2

C. CH3CBr2C(CH3)2

D. CH3CH(CH3)CHBrCH3



3. How many structural isomers are there with the molecular formula C4H10?

A. 2

B. 3

C. 4

D. 5

4. What is the IUPAC name for CH3CH2CH2CH2CHO ?

A. pentan-1-ol

B. pentanone

C. pentanoic acid

D. pentanal

5. Identify the functional group present in HCOOCH3.

A. carboxyl

B. ester

C. ether

D. aldehyde



6. Which three compounds form part of a homologous series?

A. C2H2, C2H4, C2H6

B. CH3OH, C2H5OH, C3H7OH

C. CH3CH2CH2CH2OH, CH3CH2CH(OH)CH3, CH3CH(CH3)CH2OH

D. CH3CH2CHO, CH3COCH3, CH3CH2CH2OH

7. Which products are most likely to be formed if excess butane is burned in a limited

supply of air?

A. hydrogen and carbon

B. water and carbon monoxide

C. hydrogen and carbon dioxide

D. hydrogen and carbon monoxide

8. Which of the following contribute significantly to the low reactivity of alkanes?

I. The relatively strong C-H bond

II. The very low polarity of the C-H and C-C bonds

III. The tetrahedral shape of the molecules

A. I and II only

B. I and III only

C. II and III only

D. I, II and III



9. Which species is a free radical?

A. Cl.

B. Cl+

C. Cl

D. Cl:

10. Which reaction could be a termination step in the reaction of ethane and chlorine in the

presence of ultraviolet light?

A. CH3CH2+ + Cl- CH3CH2Cl

B. CH3CH2. + Cl2 CH3CH2Cl + Cl

.

C. CH3CH2. + CH3CH2

. CH3CH2CH2CH3

D. CH3CH3 + Cl. CH3CH2

. + HCl

11. Which is/are the products when but-2-ene reacts with hydrogen bromide?

A. CH3CH2CHBrCH3 + H2

B. CH3CHBrCHBrCH3 + H2

C. CH3CH2CH2CH2Br

D. CH3CH2CHBrCH3



12. Which can react to form addition polymers?

I. H2C=CH(CH3)

II. H2C=CH2

III. H2C=CHCl

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

13. Which is the correct equation for the reaction of bromoethane with an aqueous

solution of sodium hydroxide?

A. CH3CH2Br + NaOH CH3CH2ONa + HBr

B. 2CH3CH2Br + 2NaOH CH3CH2OCH2CH3 + H2O + 2NaBr

C. CH3CH2Br + NaOH CH3CH2OH + NaBr

D. CH3CH2Br + NaOH CH3CH3 + NaOBr

14. Which compound is a tertiary alcohol?

A. butan-1-ol

B. butan-2-ol

C. 2-methylpropan-2-ol

D. 2-methylpropan-1-ol



15. Which of the following statements support the fact that benzene does not consist of

alternating double and single bonds between the six carbon atoms?

I. All the carbon to carbon bond lengths are equal

II. Benzene does not readily undergo addition reactions

III. The enthalpy of hydrogenation of benzene is less than three times the

enthalpy of hydrogenation of cyclohexene.

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

16. Which is a correct statement about alcohols?

A. Secondary alcohols are formed by the oxidation of ketones.

B. Tertiary alcohols can be readily oxidised to carboxylic acids.

C. Primary alcohols can be formed by the reduction of carboxylic acids.

D. Secondary alcohols can be oxidised to form aldehydes.

17. What will be the major organic product formed when propan-2-ol is reacted with a

warm acidified solution of potassium dichromate(VI)?

A. Propan-1-ol

B. Propanal

C. Propanoic acid

D. Propanone



18. Which functional group is present in the compound with the following structure?

A. Amine.

B. Carboxamide

C. Ketone

D. Nitrile

19. Which reagent can be used to distinguish easily between an alkene and an alkane?

A. Bromine water

B. Acidified potassium dichromate solution

C. Chlorine in ultraviolet light

D. Sodium hydroxide solution

20. Which two step synthesis could be used to convert ethane into ethanol?

A. Addition of hydrogen followed by reaction with water.

B. Substitution with water and removal of hydrogen.

C. Substitution with chlorine followed by substitution with sodium hydroxide.

D. Addition of chlorine followed by hydration with water.

SL Topic 10 Organic Chemistry (1) (SL)

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