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WorksheetsChemistry review
Total questions: 25
Worksheet time: 23mins
sulfuric acid + copper oxide ——> _________
copper sulfide+water
Copper sulfate+oxygen
Copper sulfate+ water
Copper sulfate+hydroxide
Iron + Oxygen + Water ——> _________
water iron oxide
hydrated iron oxide
hydrated iron hydroxide
hydrated iron rust
The forks are made from silver. Their surfaces are covered in _________
green silver sulfide
black silver sulfate
black silver sulfide
black silver oxide
What color are these metal compound: Lithium, Sodium, Potassium, Calcium, Barium (pleases choose the answer in the correct order )
crimson(dark red), red, lilac(purple), yellow, green
red, lilac(purple), yellow, green, crimson(dark red)
lilac(purple), red, green, crimson(dark red), yellow
crimson(dark red), yellow, lilac(purple), red, green
The is in the centre of an atom.
whizz around the outside.
Nucleus, proton
Nucleus, Electrons
Shell, Electrons
Atom, Electrons
Which of the following line represent "the positive alpha particles hit the centre of the nucleus"
1
2
3
What is the definition of "Isotope"
(remind: Read the following definition carefully)
Atoms of the same element that have same numbers of neutrons are called isotopes.
Atoms of the different element that have same numbers of neutrons are called isotopes.
Atoms of the same element that have different numbers of protons are called isotopes.
Atoms of the same element that have different numbers of neutrons are called isotopes.
The group number is the _______ as the number of outer shell electrons, from Group I to Group VII.
same
different
Which of the following is the definition of Combustion Reactions
Any reaction in which a substance reacts quickly with oxygen, and gives out heat and light
The substances you end up with are different from the ones you started with.
The change is usually difficult to reverse. At the end of the reaction, you cannot easily get back the substances you started with.
a ceramic or metal container in which metals or other substances may be melted or subjected to very high temperatures
what is (aq) mean
containing water; like water
to show that a substance is dissolved in
a tank or pool or bowl filled with water for keeping live fish and underwater animals
react with water
Intramolecular force is______ (strong or weak)
Intermolecular force is______ (strong or weak)
stong, weak
weak, strong
Which of the following equations are correctly balanced?
12CO2 + H2O ---> C6H12O6 + O2
CO2 + H2O ---> 3C6H12O6 + O2
CO2 + 9H2O ---> C6H12O6 + O2
6CO2 + 6H2O ---> C6H12O6 + 6O2
Melting and boiling points _________ going __________ Group 7. This is because the molecules become _________. the intermolecular forces become __________.
increase, up, larger, weaker
increase, down, smaller, stronger
increase, down, larger, stronger
decrease, down, lager, stronger
Acid + Alkali ——> ?
Salt + water
Salt + metal
Salt + non-metal
metal + water
Electrons whizz around an atom outside its nucleus. The electrons occupy shells. Shells are also called _______or________.
shell
energy level
electronic field
orbits
Right the reactivity series in the correct order.(do not add the blanket)
(use the form as : (每一个词的第一个字母大写)*****,*****,*****)
HINT:
Please
Stop
Calling
Me
A
Careless
Zebra
Instead
Try
Learning
HOW
Copper
Saves
Gold
(a)
How to prevent iron corrosion?
Coating iron with:____________________
paint , oil or grease , another metal.
paint , oil or grease , fire
paint , powders , another metal
wash, oil or grease , another metal.
Lots of sparks and molten iron.————>?
fire reaction
Thermal reaction of iron and aluminium
thermite reaction
thermite response
_______ reactive metals displace ______ reactive metals from solutions of their salts, and from their oxides.
less, more
same, different
more, less
less, less
Aluminium exists as aluminium oxides in the Earth’s crust. Aluminium is extracted from its oxide by (a) . (小写)
what is 量筒 in english (用小写)
(a)
What are salts?
A salt is a mixture made when a non-metal replaces the hydrogen in an acid.
A salt is a compound made when a non-metal replaces the hydrogen in an acid.
A salt is a mixture made when a metal replaces the hydrogen in an acid.
A salt is a compound made when a metal replaces the hydrogen in an acid.
Fe + CuSO4 →?
Fe + SOCu4
Cu + FeSO4
Cu + 2FeSO4
2Cu + FeSO4
what are the color of the CuSO4 and FeSO4
blue, pale grey
blue, pale green
brown, pale green
brown, pale grey
which of the following is the correct chemical reaction of thermite reaction
2Al + Fe2O3 → Fe + 2AlO3
Al + Fe2O3 → Fe + Al2O3
2Al + Fe2(O3)2 → Fe + 2Al2O3
2Al + 2Fe2O3 → 2Fe + AlO2
