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Periodic Classification of Elements and Periodicity - 1
1.
Periodic classification is based on the _________ and __________ properties of the substance.
a) Transition
b) Physical, Chemical
c) Chemical, Physical
d) Hydrogen Bonding
2.
__________ gave the law of octave.
a) Metals
b) Newland
c) Periods
d) Ionic
3.
The horizontals rows of the table are called _________.
a) Periods
b) Newland
c) Rare earth elements
d) Alkali metals
4.
The sub-groups containing the typical or normal elements are called _________ sub-group.
a) H
b) X
c) Y
d) A
5.
The 6th period contain _____________ elements.
a) 36
b) 38
c) 32
d) 34
6.
Due to scarcity the inner transitions elements are also called.
a) Free
b) Rare earth elements
c) Transition
d) Hydrogen Bonding
7.
The elements of group A are also called ___________.
a) Salt
b) Amphoteric
c) Alkali metals
d) Metals
8.
The name Halogens is given to the elements of VIIA due to their ________ forming property.
a) Acidic
b) Cu, H
2
O
c) Salt
d) Amphoteric
9.
The elements in the periodic table can also be classified into ___________ blocks.
a) Four
b) Five
c) Six
d) Three
10.
Chemically all the elements which have a tendency to form positive ion by losing electron are considered as _______________.
a) Acidic
b) Cu, H
2
O
c) Alkali metals
d) Metals
11.
Metals form _____________ oxides when dissolved in water.
a) Free
b) Transition
c) Positive
d) Basic
12.
Semimetals or metalloids form ______________ oxides.
a) Acidic
b) Positive
c) Cu, H
2
O
d) Amphoteric
13.
H
2
S0
4
is a ______________ oxide.
a) Acidic
b) Cu, H
2
O
c) Ionic
d) Salt
14.
CuO + H
2
.
a) Free
b) Acidic
c) Ionic
d) Cu, H
2
O
15.
When a neutral atom loses one or more electrons it become a __________ ion.
a) Free
b) Positive
c) Basic
d) Released
16.
Energy is usually _____________ when electro negative elements absorb the first electron.
a) Basic
b) Released
c) Transition
d) Free
17.
Due to partly filled d-orbital _____________ elements usually show variable valency.
a) Free
b) Ionic
c) Transition
d) Hydrogen Bonding
18.
The electrical conductance of an element depends upon the number of _______ or mobile electrons.
a) Basic
b) Free
c) Periods
d) Released
19.
Halides of group A are _______________ in nature.
a) Salt
b) Ionic
c) Periods
d) Acidic
20.
Highly polar hydrides show __________ in them.
a) Hydrogen Bonding
b) Rare earth elements
c) Acidic
d) Cu H
2
O
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