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MDCAT Chemistry Chapter 10 Chemical bonding Online Test MCQs With Answers
Question # 1
About 25% of earth crust mass is made up of element
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Oxygen
Silicon
Aluminium
Aluminates
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Question # 2
Which of the following are not known to form compounds in more than one oxidation state?
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Transition metals
Halogens
Alkali metals
Noble gases
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Question # 3
Which of the following belongs to alkaline earth metals
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Cu
Zn
Sn
Mg
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Question # 4
Which is the least reactive of all the alkali metals
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Li
Na
K
Cs
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Question # 5
What is the formula of magnesite?
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PbS
MgSO4. 7H2O
MgCO3
CaCO3
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Question # 6
Lithium differs from rest of members of its group due to which of following reasons
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High E.N of Li+1
Small radius
High charge density
All above are correct
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Question # 7
Li resembles with Mg, because
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the ratio of their charge to size is nearly the same
both have nearly same size
both are metallic in nature
both are found together in nature
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Question # 8
Elements of group IV-A are
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neither strongly electropositive nor strongly electronegative
strongly electropositive
strongly electronegative
none of these
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Question # 9
How magnesium reacts with water?
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In frozen ice water
With cold water
In with steam
In hot state
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Question # 10
Which is not mineral of AI?
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Diaspore
Corrundam
Bauxite
Galena
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Question # 11
Which one of following property is not true about alkali metals?
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Strongest bases due to their hydrides
Low ionization energy
Oxidation number more than +1
Form acidic oxides
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Question # 12
Soda lime is often employed to remove both
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H2O and NO2
CO2, and NO2,
H2O and CO2
H2S and CO2
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Question # 13
Elements of group ll-A are called
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f-block elements
s-block elements
p-block elements
d-block elements
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Question # 14
One of the following metals is the most reactive and form super oxide. Indicate that
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Mg
K
Be
Li
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Question # 15
Compared with alkaline earth metals, the alkali metals exhibit.
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lower ionization energies
greater hardness
high boiling point
smaller ionic radii
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Question # 16
Plaster of Paris is obtained from
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marble
bauxite
gypsum
limestone
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Question # 17
The general electronic configuration of group IV-A elements is
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ns2, np6
ns2, np4
ns2, np3
ns2, np2
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Question # 18
Which of the following element has high m.p and b.p, it acts as a reducing agent, and can react with bases?
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Sr
Ca
Be
Mg
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Question # 19
Beryllium differs from other elements of group Il-A due to
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high charge density
comparatively high nuclear charge
small radius
all above
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Question # 20
The reaction between Cu and conc. H2SO4 produces
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Cu+2
SO
2
SO
3
H
2
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