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Free download in PDF Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties Multiple Choice Questions and Answers for Board, JEE, NEET, AIIMS, JIPMER and other competitive exams. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Question 20.
Increasing order of electro negativity is
[A]
Bi < P < S < Cl
[B]
P < Bi < S < Cl
[C]
S < Bi < P < Cl
[D]
Cl < S < Bi < P
(2)
The element californium belongs to a family of :
[A]
Alkali metal family
[B]
Actinide series
[C]
Alkaline earth family
[D]
Lanthanide series
(3)
On the Paulings electro negativity scale the element next to F is
[A]
N
[B]
Cl
[C]
O
[D]
Ne.
(4)
Which of the following forms the most stable gaseous negative ion?
[A]
F
[B]
Cl
[C]
Br
[D]
I
(5)
The electronic configuration of halogen is
[A]
ns² np6
[B]
ns² np3
[C]
ns² np5
[D]
ns²
(6)
The number of elements in the 5th period of the periodic table is
(7)
The reduction in atomic size with increase in atomic number is a characteristic of elements of-
[A]
d−block
[B]
f−block
[C]
Radioactive series
[D]
High atomic masses
(8)
The electronic configuration of an element is 1s², 2s² 2p6, 3s² 3p³. What is the atomic number of the element which is just below the above element in the periodic table
[A]
31
[B]
34
[C]
33
[D]
49
(9)
In the modern periodic table , the period indicates the value of:
[A]
Atomic Number
[B]
Atomic Mass
[C]
Principal Quantum Number
[D]
Azimuthal Quantum Number
Answer: Principal Quantum Number
(10)
Arrange S, O and Se in ascending order of electron affinity
[A]
Se < S < O
[B]
Se < O < S
[C]
S < O < Se
[D]
S < Se < O
(11)
In the long form of the periodic table, the valence shell electronic configuration of 5s²5p4 corresponds to the element present in:
[A]
Group 16 and period 6
[B]
Group 17 and period 6
[C]
Group 16 and period 5
[D]
Group 17 and period 5
Answer: Group 16 and period 5
(12)
In the modern periodic table, the period indicates the value of:
[A]
Atomic Number
[B]
Atomic Mass
[C]
Principal Quantum Number
[D]
Azimuthal Quantum Number
Answer: Principal Quantum Number
(13)
Which of the following oxides is amphoteric in character?
[A]
SnO2
[B]
CO2
[C]
SiO2
[D]
CaO
(14)
The group number, number of valence electrons, and valency of an element with the atomic number 15, respectively, are:
[A]
16, 5 and 2
[B]
15, 5 and 3
[C]
16, 6 and 3
[D]
15, 6 and 2
(15)
On the Paulings electronegativity scale the element next to F is
[A]
N
[B]
Cl
[C]
O
[D]
Ne.
(16)
Which of the following properties generally decreases along a period?
[A]
Ionization Energy
[B]
Metallic Character
[C]
Electron Affinity
[D]
Valency.
Answer: Metallic Character
(17)
Representative elements are those which belong to
[A]
p and d – Block
[B]
s and d – Block
[C]
s and p – Block
[D]
s and f – Block
(18)
The correct order of first ionization potential among following elements, Be, B, C, N and O is
[A]
B < Be < C < O < N
[B]
B < Be < C < N < O
[C]
Be < B < C < N < O
[D]
Be < B < C < O < N
Answer: B < Be < C < O < N
(19)
The element with atomic number 35 belongs to
[A]
d – Block
[B]
f – Block
[C]
p – Block
[D]
s – Block
(20)
The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:
[A]
Both are found together in nature
[B]
Both have nearly the same size
[C]
Both have similar electronic configuration
[D]
The ratio of their charge and size (i.e. charge density) is nearly the same
Answer: The ratio of their charge and size (i.e. charge density) is nearly the same
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