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Chemistry 9th Class English Medium Unit 8 Online Test MCQs With Answers
Question # 1
Pure alkalis metals can be cut siply by knife but iron cannot bccause of alkali meals have
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Non metalic bonding
Strong metallic bonding
Weak metallic bonding
Moderate metqllic bonding
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Question # 2
How many elements are present in 6th period.
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2
8
18
32
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Question # 3
The minium amont of energy whcih is required to remvoe an electron from valence shell of the gaseous state of an atom is called.
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Potential energy
Ionization energy
Electron affinity
Electronegativity
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Question # 4
Which one of the followign halogns has highest electronegativity
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Iodine
Fluorine
Chlorine
Bromine
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Question # 5
The distance between the neclei of two carbon atoms in its elemetnal from is
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150 pm
152 pm
154 pm
156 pm
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Question # 6
Which are good conductor of heat and electricity
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Metals
Non metals
Metalloids
All of these
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Question # 7
A yellow solid element exists in allotropic forms whic is also present in fossil fuel. Indicate the name
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Iodine
Carbon
Sulphur
Aluminium
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Question # 8
Mark the icorrect statement about ionization energy.
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It is measured in kJmol-1
It is absorption of energy
It decreased in a period
It decrese in a group
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Question # 9
Elements of Group1 are called.
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Alkali Metlas
Alkali earth metals
Transition metals
Halogen
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Question # 10
The horizontal lines present in the priodic table are called.
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Groups
Periods
Both a and b
None of these
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Question # 11
When we mvoe from top to bottom in a group atomic size.
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Decrease
Increases
First increases then decreases
None of the above
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Question # 12
Elments re classified into four blocks depending upon
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Shell
Atomic mass
Sub -Shell
Atomic Number
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Question # 13
All metals bear
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Positive charge
Negative charge
Both a and b
None of these
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Question # 14
The element having less value of ionizatin energy and less value of electron affinity is likely to belong to.
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Group1
Group 13
Group 16
Group 17
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Question # 15
Which one of the following halongesn has lowest electronetivity
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Iodine
Chlorine
Fluorine
Bromine
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