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Periodic Classification of Elements and Periodicity - 3
1.
Due to partly filled d-orbital _____________ elements usually show variable valency.
a) Hydrogen Bonding
b) Transition
c) Ionic
d) Free
2.
The electrical conductance of an element depends upon the number of _______ or mobile electrons.
a) Released
b) Basic
c) Periods
d) Free
3.
Halides of group A are _______________ in nature.
a) Acidic
b) Periods
c) Ionic
d) Salt
4.
Highly polar hydrides show __________ in them.
a) Rare earth elements
b) Cu H
2
O
c) Hydrogen Bonding
d) Acidic
5.
ENCIRCLE THE CORRECT ANSWERS
a) Metalic oxides are amphoteric in nature.
b) Metalic oxides are basic in nature.
c) Metallic oxides are acidic in nature.
d) Metalic oxides are neutral in nature.
6.
ENCIRCLE THE CORRECT ANSWERS
a) Highly polar hydrides show hydrogen bonding.
b) Highly polar hydrides show covalent bonding.
c) Highly polar hydrides show non-polar bonding.
d) Highly polar hydrides show ionic bonding.
7.
The boiling point of covalent hydrides generally on descending a group.
a) Increases
b) Has no change
c) Decreases
d) Remain same
8.
PbCl
2
is mainly ionic and PbCl
4
is fairly _____________.
a) Polar
b) Non-polar
c) Ionic
d) Covalent
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