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Worksheetsclass 7c
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
what is a radical
a)
combining power of an element.
b)
a group of atoms behaving as a unit in a number of compounds.
c)
single compound breaks down into 2 or more substances
d)
none of these
2.
what is the valency of SO4 (a)
3.
formula of magnesium sulphate
a)
Mg(SO)4
b)
MgSO
c)
MgSO4
d)
Mg2(SO4)2
4.
valency of Fe
a)
2,3
b)
2,1
c)
1
d)
3,1
5.
formula of zinc carbonate
a)
ZnCO3
b)
ZnCo3
c)
ZnCO
d)
ZnCo
6.
formula of Calcium hydroxide
a)
CaOH2
b)
Ca2OH2
c)
Ca(OH)₂
d)
CA(OH)2
7.
true or false
the valency of zinc is 3,4
(a)
8.
formula of common salt
(a)
9.
formula of sodium oxide
(a)
10.
formula of aluminium chloride
a)
AlCl3
b)
Al(Cl)3
c)
AlCl
d)
Al2Cl2
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