Chapter 3-5 Student Chemistry Worksheet - Class X, Central Board Of Secondary Education Page 19
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30Formative Assessment Manual for Teachers
Carbon and its Compounds - Chapter 4
●
Difference in the formula and molecular mass of two consecutive compounds members
of same
●
Homologous series is ‘-CH
’ and -14 u respectively.
2
●
A homologous series can be identified with a general formula which helps in
determining the other members of the series.
Assessment parameters: As indicated in the worksheet.
Student Worksheet
Time: 10 minutes
Instructions:
Arun wrote few series of hydrocarbon and left blanks in between. Look at the chemical formula in
the series of hydrocarbons carefully and answer the questions that follow:
I
II
III
IV
V
CH
C
H
C
H
CH
OH
D
4
2
4
2
2
3
C
H
C
H
B
C
H
OH
CH
COOH
2
6
3
6
2
5
3
C
H
A
C
H
C
H
OH
C
H
COOH
3
8
4
6
3
7
2
5
C
H
C
H
C
H
C
C
H
COOH
4
10
5
10
5
8
3
7
Ql. What is the difference in the formula and molecular mass between C
H
& C
H
; C
H
2
6
3
8
3
8
and C
H
?
4
10
Q2. What are such series of Hydrocarbons called?
Q3. Substitute the blanks A,B,C,D with correct chemical formula of the compound.
A.
_________________________
B.
_________________________
C.
_________________________
D.
_________________________
Q4. Name the functional group present in the series IV & V.
Q5. Which is the first member of the alkane series?
Q6. What is the general formula of the homologous series of alkyne and alcohol.
Q7. Name the chemical formula of 6th member of alkyne series and 15th member of
alcohol series.
49
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