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Periodic Classification of Elements and Periodicity - 2
1.
The elements in the periodic table can also be classified into ___________ blocks.
a) Three
b) Five
c) Four
d) Six
2.
Chemically all the elements which have a tendency to form positive ion by losing electron are considered as _______________.
a) Metals
b) Cu, H
2
O
c) Acidic
d) Alkali metals
3.
Metals form _____________ oxides when dissolved in water.
a) Transition
b) Basic
c) Free
d) Positive
4.
Semimetals or metalloids form ______________ oxides.
a) Amphoteric
b) Cu, H
2
O
c) Positive
d) Acidic
5.
H
2
S0
4
is a ______________ oxide.
a) Cu, H
2
O
b) Salt
c) Ionic
d) Acidic
6.
CuO + H
2
.
a) Cu, H
2
O
b) Free
c) Acidic
d) Ionic
7.
When a neutral atom loses one or more electrons it become a __________ ion.
a) Free
b) Released
c) Positive
d) Basic
8.
Energy is usually _____________ when electro negative elements absorb the first electron.
a) Released
b) Basic
c) Transition
d) Free
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