WorksheetsChemistry
Total questions: 20
Worksheet time: 7mins
Who suggested the idea of representing elements with symbols
John Dalton
James Chadwick
Berzelius
William crookes
A symbol represents a short form of a/an ______________
Atom
Molecule
Element
Compound
Which compound has the formula C3H8
Propane
Ethanol
Butane
Methane
Which one is not a example of hydrocarbon
Methane
Ethanol
Propane
Butane
Blue vitriol is a pentahydrate
TRUE
FALSE
Sulphur in iron [ll] sulphide is insoluble in which solvent
H2O
KBr
H2SO4
CS2
Fe + ________ -----> FeCl2 + H2
2HCl
4HCl
HCl
4Cl
What is the valency of nitrogen in N2O
-2
+1
4
-3
What is the molecular weight of sulphur dioxide (SO2)
46 a.m.u
60 a.m.u
64 a.m.u
Name three metals whose symbols are derived from their Latin names
Potassium
Lead
Lithium
Silver
Which of these is not a monoatomic element
Potasium
Calcium
Ammonium
Lithium
Which of the following exhibits variable valency
mercury
Uranium
Stannous
Platinum
What is the formula for tetra amine copper(II)sulphate
[Ag(NH3)2]Cl
[Cu(NH3)4]SO4
[Zn(NH3)4]SO4
Ignore the (+) and (-) sign on each symbol
TRUE
FALSE
Variable valency is exhibited, since electrons are lost from an element from the ________________ shell
Penultimate
Valence
Electrovalent
Inner
Compounds are always ____________ in nature
Homogeneous
Heterogeneous
Neutral
State which of the following is a radicle
Magnesium
Ammonium
Zinc
Peroxide
A chemical equation does not tell us about ______________
Concentration
Nature
Direction
State of matter
Give the valency of carbide
(a)
Valency of MnO4
-1
+3
-2
+2
