01.For each of the following items, choose the most correct answer from the given alternatives and write its letter beside the item number in your answer sheet.
i)
A force of attraction that holds atoms together to
form molecules is:
A. Inter-molecular
force
B. Force of
attraction
C. Repulsion force
D. Chemical bond
ii)
The combining power of an element is:
A. Oxidation
B. Reduction
C. Valence
D. Radical
iii) The systematic
way of assigning names to items or substances that belong to a particular group
or classification is:
A. Molecular formula
B. Nomenclature
C. Chemical formula
D. Taxonomy
iv)
The oxidation number of chlorine in KClO3-1
is:
A. -4
B. +5
C. +4
D. -5
v)
The chemical formula of calcium chloride is:
A. Ca2Cl
B. CaCl2
C. CaCl
D. Cl2Ca
Answers:
|
i |
ii |
iii |
iv |
v |
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02.Define the following terms
i.
Chemical formula
ii.
Radical
iii. Electrovalent
bond
iv.
Covalent bond
03.Differentiate electrovalent
from covalent bond (four points)
04.(a) Define oxidation number
(b) Calculate the oxidation
state of the underlined elements in the given compounds
i)
Cr2O72-
ii)
SO32-
iii) KClO3
iv)
NO2-
v)
NaCl
05.Write the names of the
following compounds:-
i)
FeCl3
ii)
FeCl2
iii)
Cu2S
iv)
N2O4
v)
SF6
06.Write the chemical name and
chemical formula of the following compounds
|
Common name |
Chemical name |
Chemical
formula |
|
Common salt |
|
|
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Baking soda |
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Soda ash |
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Chalk |
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07.(a) Define the following
terms
i.
Empirical formula
ii.
Molecular formula
