Organic Chemistry – Worksheet
1) Give the general formula of the homologous series of
a) alkane b) alkene c) alkyne d) alcohol e) acid
2) State your observations when you bubble ethene into a solution of bromine in carbon
tetrachloride
3) Ethanol can be converted to ethene which can then be changed to ethane.
a) The conversion of ethanol to ethene is an example of …................
b)Conversion of ethanol to ethene requires the use of …....................
c)The conversion of ethene to ethane is an example of …..................
d)Catalyst used in conversion of ethene to ethane is commonly............
4) Name and explain the type of reaction that takes place between
a) ethane and chlorine
b) ethylene and chlorine
5) Draw the structural formula of
a) 4,4 – dibromo – 2-pentene
b) 2 methyl – 2 chloropropane
c) 1-propanol
6) The list of some organic compounds is given below. Choose the suitable organic compound
for the following statements.
Ethanol, Ethane,Methanol,Methane,Ethyne,Ethene
a) Compound formed when formaldehyde is reduced by lithium aluminium hydride
b) Gives red ppt on passing through ammoniacal cuprous chloride solution
c) an unsaturated compound which decolourises alkaline potassium permanganate solution
d)breaks down to form acetylene on cracking at 1500 c
e) Compound formed due to catalytic oxidation of methane
7) Write balanced equations for
a) Hydrolysis of ethyl chloride
b)Preparation of acetylene from calcium carbide
c)Acetic acid from ethanol
d)Esterification
8) Ethane, Ethene, Ethanoic acid, Ethyne,Ethanol,ethyle acetate
From the box above name
a) The compound with -OH as part of its structure
b) The compound with -COOH as part of its structure
c)Homologue of Homologous series wit hgeneral formula CnH2n
d)The compound formed by hydrolysis of aqueous caustic potash
e)Forms an alkane on cracking in absence of air
f)Formed when ethyle alcohol and acetic acid reacts
9) Give reasons
a)Ethyne is more reactive than ethane or ethene
b)Alkanes are called paraffins, methane called marsh gas
c)Alkenes are called olefins
10) What is isomerism? Draw the structural formula of
a) Isomers of butane
b) Isomers of pentane
11) Give the structural formula of the following compounds
a)Methyl chloride
b) Ethanol
I) How would you get trichloromethane from (a)
ii) How would you get ethene from (b) (give equation)
Iii) How would you convert ethene to ethane (give equation)
12) Give balanced chemical equation showing the preparation of ethane using sodalime and
sodium salt of fatty acid.
13) Give balanced equation for
a)Conversion of methane to formaldehyde
b)ethane to methane
c)methane to ethane
14) Write the structural formula of
a) methanal b) ethane – 1,2,-diol c) 3 – bromo butanoic acid d) chloro ethane
15) Which of the following compound will carry out substitution reaction. Give reason
C3H6, C3H8, C2H4, C5H12, C2H2.
16) Which of the following is an unsaturated compound
C4H10, C2H2, CH4, CH3OH
17) Give balanced equations for the following
a) Sodium ethanoate -----> Marsh gas
b) Ethyl iodide ------> Ethane
c) Ethanol --------> Ethene
d) 1,2 dibromo ethane -----> acetylene
18) Select from the letters A to G the correct answers corresponding to the statements from 1
to 5
a) Ammoniacal CuCl b) Trichloromethane
c) Trichloro ethane d)Bromine solution
e) Aqueous KOH f) Ethene g) Sodalime h) Ethanol
i)Ethyne
I) The reagent which can distinguish between ethene and ethyne
ii) The organic compound which forms carbontetrachloride
iii) The substance which reacts with bromoethane to give ethanol
iv) The substance which gives bromoethane on reaction with Hbr
v) The substance which reacts with acetic acid to give ethyl acetate
19) When a number of organic compounds, of the same class are arranged in order of
increasing molecular mass, they form a ….............. Akanes form one such class. They
have the general formula.................. and each successive alkane differs by the addition of
a ….............group. Alkyl groups are derived from alkanes by the loss of a …......... atom.
The name and formula of the alkyl group derived from the parent alkane ethane is …........
and …............. respectively.
20) A,B,C,D are 4 organic compounds belonging to four different groups. Identify the class of
compound to which A,B,C,D belongs
a) When A and B are treated with alkaline KMnO4, the purple colour of the solution is discharged.
b)When sodium metal is added to C and D, a colourless odourless neutral gas is evolved which
burns with a pop sound.
c) A forms a red ppt with ammoniacal cuprous chloride solution while B does not give any ppt with
the same
d) C is neutral to litmus while D turns blue litmus solution pink