Pure Substances and Mixtures

Quiz by Aminath Ishama

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Q 1/16
Score 0
Which one of the following statements is correct?
29
Compounds consist of two or more different types of atom.
An element is always represented by a symbol consisting of two letters such as He.
A compound can easily be split up into its different elements.
Elements consist of only one type of atom.

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16 questions

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Q1
Which one of the following statements is correct?
Compounds consist of two or more different types of atom.
An element is always represented by a symbol consisting of two letters such as He.
A compound can easily be split up into its different elements.
Elements consist of only one type of atom.
45s
Q2
A compound is a substance that
is made up of only element.
is made up of two or more mixtures joined together.
contains only metallic elements chemically joined together.
contains two or more elements chemically combined together in a fixed proportion.
45s
Q3
This diagram represents
a mixture
an element
a compound
an atom
20s
Q4
Which of the following statements is correct?
Mercury is a mixture and air is a compound.
Air is a mixture and sugar is a compound.
Sugar is a mixture and Iron is a compound.
Air is a mixture and Sulphur is a compound.
45s
Q5
The properties of a compound will be the same as the properties of the elements that make up the compound.
False
True
20s
Q6
How many Hydrogen atoms are there in the compound?
4
3
5
6
20s
Q7
Which one of the following is a homogenous mixture?
30s
Q8
Which of the following shows the correct number of atoms of each element in the compound?
45s
Q9
What is shown in the picture?
heterogeneous mixture
homogenous mixture
compound
element
20s
Q10
Which one of the following shows a heterogeneous mixture?
30s
Q11
How many atoms of oxygen are there in tartaric acid?
4
2
4
6
20s
Q12
What are the elements present in the compound?
krypton, hydrogen, calcium, oxygen
potassium, helium, carbon, oxygen
krypton, hydrogen, carbon, oxygen
potassium, hydrogen, carbon, oxygen
30s
Q13
Which of the statements is not true about elements?
Elements are pure substances.
There are 118 known elements.
Elements are made up of one basic type of atoms.
Elements can be broken down into simpler substances by chemical methods.
45s
Q14
Which of the statements is not true about mixtures?
The percentage of each element or compound in a mixture is not always the same.
The components of a mixture are physically joined together.
The substances in a mixture may be solids, liquids or gases.
Mixtures consist of two or more pure substances chemically mixed together.
45s
Q15
Compounds have fixed melting and boiling points.
False
True
20s