81
The first and third members of the Dobereiner triad are phosphorus and antimony, the second member of this triad is-
A)
iodine
B)
sulphur
C)
calcium
D)
arseni
Answer & Solution
Answer: Option
D
82
Identify the element that does not belong to the following group.
A)
Neon
B)
Platinum
C)
Krypton
D)
Argon
Answer & Solution
Answer: Option
B
83
Which element has the highest electron affinity in halogens?
A)
Cl
B)
F
C)
Br
D)
I
Answer & Solution
Answer: Option
A
84
Which of the following is the minimum electronegative element?
A)
Cs
B)
Pt
C)
Ag and Au
D)
Al and Li
Answer & Solution
Answer: Option
A
85
The reactivity of non-metals within a group in the Periodic Table
A)
increase down the group
B)
decrease down the group
C)
first increase then decrease down the group
D)
first decrease then increases down the group
Answer & Solution
Answer: Option
B
86
Match
List I and
List II .
List-I List-II
a. Elements in group I A
1. Inert gas
b. Elements in group zero
2. Alkali metal
c. Elements of d-block
3. Inner-transiti on element
d. Elements of f-block
4. Transition element
A)
a-2, b-1, c-4, d-3
B)
a-1, b-4, c-3, d-2
C)
a-4, b-3, c-2, d-1
D)
a-3, b-2, c-1, d-4
Answer & Solution
Answer: Option
A
87
The fourth and fifth period has-
A)
18 elements
B)
11 elements
C)
9 elements
D)
8 elements
Answer & Solution
Answer: Option
A
88
Select the Element which does not belong to the following group:
A)
Zinc
B)
Neon
C)
Helium
D)
Xenon
Answer & Solution
Answer: Option
A
89
What are the vertical columns present in the modern periodic table?
A)
groups
B)
periodic
C)
group
D)
column
Answer & Solution
Answer: Option
C
90
What does the term periodicity mean?
A)
It is a repetition of chemical properties
B)
It is a repetition of similar properties after a certain interval
C)
It is a repetition of certain properties after a certain interval
D)
It is the repetition of similar elements after a certain interval
Answer & Solution
Answer: Option
B
