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votes
1
answer
State three conditions necessary for rusting.
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
air and combustion
rusting
0
votes
1
answer
The table below shows the PH values of solutions I, II, III and IV.
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
acids bases and indicators
0
votes
2
answers
The table below shows some properties of substances D, F and E. Study it and answer the questions that follow.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
chemical families patterns in properties
0
votes
1
answer
The table below gives the energy required to remove the outermost electron for some group I elements.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
structure of the atom and the periodic table
chemical families patterns in properties
0
votes
1
answer
The diagram below shows the physical state of matter. Study it and answer the questions that follow.
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
simple classification of substances
0
votes
1
answer
What is an impurity?
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
simple classification of substances
0
votes
1
answer
The table below gives the number of electrons, protons and neutrons in substances X, Y and Z. Study it and answers the questions that follow.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
structure of the atom and the periodic table
0
votes
1
answer
The grid below is part of the periodic table. Use it answer the questions that follow. (The letters are not the actual symbols of the elements).
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
structure of the atom and the periodic table
chemical families patterns in properties
structure and bonding
0
votes
6
answers
Give two allotropes of carbon.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
carbon and some of its compounds
allotropes
0
votes
1
answer
What is meant by an allotrope?
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
carbon and its compounds
allotropes
0
votes
2
answers
Define the following terms. Normal salt, Efflorescent salts and Deliquescent salts
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
salts
0
votes
1
answer
The diagram below illustrates a method of preparing salts by direct synthesis.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
salts
methods of preparing salts
0
votes
1
answer
Apart from direct synthesis name two other methods of salt preparation.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
salts
methods of preparing salts
0
votes
1
answer
Define the term salt.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
salts
0
votes
1
answer
In terms of structure and bonding, explain the following observation. Melting point of chlorine is lower than that of sulphur.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
structure and bonding.
0
votes
1
answer
In terms of structure and bonding, explain the following observation. The melting point of water H2O is higher than that of H2S.
asked
Aug 30, 2021
in
Chemistry Form 2
by
anony mous
structure and bonding.
0
votes
1
answer
Describe an experimental procedure that can be used to extract oil from nut seeds
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
simple classification of substances
separation of mixtures
0
votes
1
answer
The set up below can be used to prepare oxygen gas. Study it and answer the questions that follow.
asked
Aug 30, 2021
in
Chemistry Form 1
by
anony mous
air and combustion
oxygen gas preparation
0
votes
0
answers
asked
Aug 30, 2021
by
anonymous
0
votes
0
answers
a vertical spring of unstretched length 30 cm is clamped at its upper end when sand is placed in a pan attached to the lower end of the spring its length becomes 45cm when 20g mass is placed on top of the sand the length increases to 55cm determine the mass of the sand
asked
Aug 30, 2021
in
Physics Form 2
by
Yousuf
hookes law
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