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Basic Chemistry
Basic Chemistry
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1
A substance which chemically cannot be broken down into simpler substances is called:
an emulsion
a compound
an element
a mixture
2
Oil and fat combined together in a cream form is an example of:
a compound
a mixture
a solvent
synthesis
3
A substance formed by uniting two elements chemically is known as a/an:
atom
molecule
compound
mixture
4
Organic chemistry is the study of all substances containing:
carbon
nitrogen
hydrogen
oxygen
5
Which one of the following is not an element?
nitrogen
water
carbon
oxygen
6
Which of the following is a solid hydrocarbon?
beeswax
spermaceti wax
carnauba wax
paraffin wax
7
The smallest part of a compound which still has the same properties of that compound is:
an electron
an atom
an ion
a molecule
8
Which one of the following is not a compound?
air
water
salt
carbon dioxide
9
Which one of the following is an ionic compound?
water
carbon dioxide
methane
sodium hydroxide
10
Organic chemistry is the:
chemistry of carbon compounds
study of the physical changes associated with chemical reactions
chemistry of oxygen and it's compounds
study of the elements and their compounds
11
An atom is electrically neutral because it has:
more protons than electrons
has the same number of protons and electrons
more electrons than protons
has the same number of protons and neutrons
12
Inorganic chemistry:
study of elements and their compounds except chemistry of oxygen compounds
study of elements and their compounds except chemistry of carbon compounds
chemistry of carbon and it's compounds
chemistry of oxygen and it's compounds
13
The basic unit of matter is the:
element
atom
base
proton
14
Which one of the following acids is most abundant in fats and oils from plants and animals?
stearic acid
acetic acid
lactic acid
hydrochloric acid
15
The smallest part of an element that can exist is the:
electron
atom
proton
neutron
16
Which one of the following compounds is a hydrocarbon?
glucose
calcium carbonate
petroleum
hydrogen peroxide
17
Which one of the following is a covalent compound?
sodium chloride
potassium hydroxide
carbon dioxide
magnesium carbonate
18
Which of the following chemicals consists mainly of hydrocarbons?
almond oil
mineral oil
olive oil
lavender oil
19
An atom contains:
positive neutrons, positive protons and negative electrons
negative protons, positive electrons and positive neutrons
positive protons, uncharged neutrons and negative electrons
uncharged neutrons, negative protons and negative electrons
20
Rusting of iron is caused by:
ionisation
electrolysis
reduction
oxidation
21
An example of an element is:
carbon dioxide
ozone
water
oxygen
22
The valency of oxygen is:
4
2
1
3
23
The nucleus of an atom contains:
protons and neutrons
protons and electrons
electrons and neutrons
neutrons only
24
Matter is defined as anything that:
mixed with water
has a solid form
contains colour
occupies space
25
The number of states in which matter can exist is:
three
two
one
four
26
The chemical symbol for iron is:
I
Ie
F
Fe
27
Chemistry is the study of:
the composition of substances and their effects on one another
the science of life
the properities of matter and energy
living matter
28
The predominant bonding of atoms in inorganic compounds is know as:
ionic
double
unsaturated
covalent
29
The branch of chemistry that deals with compounds containing carbon is:
biochemistry
inorganic chemistry
organic chemistry
physical chemistry
30
The chemical symbol for sodium is:
N
S
Si
Na
