IB Topic 10 Organic Chemistry
- 1.Which of the following is true about alkane? I. they form an homologous series with the general formula CnH2n+2 II. They all have identical physical properties III. They all have similar chemical properties
- A.
I, II and III
- B.
I and III only
- C.
II and III only
- D.
III only
- 2.Which of the following two compounds both belong to the same homologous series?
- A.
CH3COOH and HCOOCH3
- B.
CH3OH and C2H5OH
- C.
C2H4 and C2H6
- D.
C2H5Cl and C2H4Cl2
- 3.How many different isomers of C5H12 exist?
- A.
1
- B.
2
- C.
3
- D.
4
- 4.
Gave the name for- A.
2,2-dimethylbutane
- B.
2-methylpentane
- C.
Hexane
- D.
2-methyl-2ethylpropane
- 5.Which statement is correct about the reaction between methane and chlorine?
- A.
It involves heterolytic fission and Cl- ions
- B.
It involves heterolytic fission and Cl. radicals
- C.
It involves homolytic fission and Cl- ions
- D.
It involves homolytic fission and Cl. radicals
- 6.Which compound is an ester?
- A.
CH3COOH
- B.
C2H5CHO
- C.
CH3OC2H5
- D.
HCOOCH3
- 7.When ethanol is partially oxidized by an acidified solution of potassium dichromate (VI), the product that can be obtained by distillation as soon as it is formed is:
- A.
Ethanal
- B.
Ethanoic acid
- C.
Ethene
- D.
Ethane 1,2 diol
- 8.Which formula is that of the secondary halogenoalkane?
- A.
CH3CH2CH2CH2Br
- B.
(CH3)2CHCH2Br
- C.
CH3CHBrCH2CH3
- D.
(CH3)2CBr
- 9.Which compound is converted to butanal by acidified potassium dichromate (VI) solution?
- A.
Butan-1-ol
- B.
Butan-2-ol
- C.
Butanone
- D.
Butanoic acid
- 10.Which reaction(s) involve(s) the formation of a positive ion? I. CH3CH2CH2Br + OH- II. (CH3)3Br + OH-
- A.
I only
- B.
Both I and II
- C.
II only
- D.
Neither I nor II
- 11.Which statement about neighbouring members of all homologous series is correct?
- A.
They all have the same empirical formula
- B.
They differ by CH2 group
- C.
They possess different functional groups
- D.
They differ in their degree of unsaturation
- 12.Which compound is a member of the same homologous series as 1-chloropropane?
- A.
1-chloropropene
- B.
1-chlorobutane
- C.
1-bromopropane
- D.
1,1-dichloropropane
- 13.Which type of compound must contain a minimum of three carbon atoms?
- A.
An aldehyde
- B.
A carboxylic acid
- C.
An ester
- D.
A ketone
- 14.What is the IUPAC name for CH3CH2CH(CH3)2?
- A.
1,1-dimenthylpropane
- B.
2-methylbutane
- C.
Isopentane
- D.
Ethyldimethylmethane
- 15.How many structural isomers are possible with the molecular formula C6H14?
- A.
4
- B.
5
- C.
6
- D.
7
- 16.Which compound is a member of the aldehyde homologous series?
- A.
CH3COCH3
- B.
CH3CH2CH2OH
- C.
CH3CH2COOH
- D.
CH3CH2CHO
- 17.Which formulas represent butane or its isomer? I. CH3(CH2)2CH3 II. CH3CH(CH3)CH3 III. (CH3)3CH
- A.
I and II only
- B.
I and III only
- C.
II and III only
- D.
I, II and III
- 18.Which substance(s) could be formed during the incomplete combustion of a hydrocarbon? I. carbon II. hydrogen III. carbon monoxide
- A.
I only
- B.
I and II only
- C.
I and III only
- D.
II and III only
- 19.What product results from the reaction of CH2=CH2 with Br2?
- A.
CHBrCHBr
- B.
CH2CHBr
- C.
CH3CH2Br
- D.
CH2BrCH2Br
- 20.What is the final product formed when CH3CH2OH is refluxed with acidified potassiu dichromate(VI)?
- A.
CH3CHO
- B.
CH2=CH2
- C.
CH3COOH
- D.
HCOOCH3
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