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WorksheetsChemistry1
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Water is an element?
a)
true
b)
false
2.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
3.
How many atoms of sodium (Na) are in one molecule of baking soda?
a)
1
b)
2
c)
3
d)
4
4.
When we combined vinegar and baking soda and created carbon dioxide what was the product?
a)
vinegar
b)
carbon dioxide and baking soda
c)
carbon dioxide
d)
vinegar and baking soda
5.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals
6.
The compounds or elements present at the end of a reaction
a)
reactants
b)
catalyst
c)
products
d)
energy
7.
Which of the following is a decomposition reaction?
a)
MgCo3 --> MgO + CO2
b)
SO3 + H2O --> H2SO4
c)
2 Mg + O2 --> 2MgO
8.
The type of reaction that releases energy as heat is called
a)
endothermic
b)
exothermic
c)
respiration
d)
photosynthesis
9.
bases are the same as an acid
a)
true
b)
false
10.
To neutralise an acid you add a
a)
acid
b)
base
c)
Ph indicator
d)
equal amount of water
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