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Class 12
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Chemistry
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The p-Block Elements
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Medium Questions
The P Block Elements
Chemistry
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Easy Qs
Med Qs
Hard Qs
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In the third excited state, the number of unpaired electrons in chlorine atom is:
A
5
B
7
C
3
D
1
Medium
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If a new noble gas is discovered then, what will be its atomic number?
A
8
7
B
1
0
4
C
1
1
8
D
1
3
2
Medium
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Which of the following electronic configuration corresponds to an inert gas?
A
1
s
1
2
s
2
2
p
5
B
1
s
2
2
s
2
2
p
6
C
1
s
2
2
s
1
D
1
s
2
2
s
2
2
p
6
3
s
1
Medium
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Mono atomic element among the following is:
A
phosphorus
B
oxygen
C
krypton
D
sulphur
Medium
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The elements with atomic numbers
2
,
1
0
,
1
8
,
3
6
,
5
4
and
8
6
are collectively known as:
A
alkaline earth metals
B
inert gases
C
halogens
D
rare earths
Medium
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The inert gas atom in which the total number of d-electrons is equal to the difference in numbers of total
p
−
and
s
−
electrons, is:
A
H
e
B
N
e
C
A
r
D
K
r
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Elements O, S, Se and Te are commonly known as:
A
Halogens
B
Rare earth elements
C
Chalcogens
D
Pnictogens
Medium
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According to Coulson the high reactivity of fluorine than other halogens is because of its:
A
high electronegativity
B
lesser internuclear repulsions
C
greater repulsions between non bonding electrons
D
All the above
Medium
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Elements with atomic numbers 9, 17, 35, 53 are collectively known as:
A
chalcogens
B
halogens
C
lanthanides
D
rare gases
Medium
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The inert gas present in the second long period is:
A
K
r
B
X
e
C
A
r
D
R
n
Medium
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>