1
The law of Octaves' was proposed by:
A)
Johann Dobereiner
B)
Alexander Newlands
C)
Lothar Meyer
D)
Dmitri Mendeleev
Answer & Solution
Answer: Option
B
2
Periodic classification of elements can be done on the basis of electronic configuration and is used to examine the
A)
Periodic trends in physical properties of elements
B)
Periodic trends in chemical properties of elements
C)
Both A and B
D)
None of the above
Answer & Solution
Answer: Option
C
3
Which of the following resembles the 10th element in Newland's periodic classification?
A)
third
B)
ninth
C)
fourth
D)
first
Answer & Solution
Answer: Option
A
4
Johann Dobereiner gave the idea of trends among physical and chemical properties of several groups of three elements, the relationship referred to as
A)
law of Triads
B)
law of Dobereiner
C)
law of Octaves
D)
law of Duet
Answer & Solution
Answer: Option
A
5
Chemical properties of elements, according to Lothar Meyer, is the periodic function of their
A)
valency
B)
atomic number
C)
atomic weight
D)
atomic size
Answer & Solution
Answer: Option
C
6
Iron that resembles cobalt and nickel in properties has been kept far away from these elements. Which was one of its shortcomings-
A)
Modern Periodic Table
B)
Octaves law of Newlands
C)
Doberiner's Triad
D)
Mendeleev's Periodic Table
Answer & Solution
Answer: Option
B
7
In Mendeleev's periodic table, iodine with lower atomic weight than that of tellurium was placed alongwith
A)
iron, cobalt and nickel
B)
fluorine, chlorine and bromine
C)
oxygen, sulphur and selenium
D)
carbon, silicon and germanium
Answer & Solution
Answer: Option
B
8
How many elements are there in the 5th Period of Modern Periodic Table?
A)
2
B)
8
C)
18
D)
36
Answer & Solution
Answer: Option
C
9
Scientists named Newlands, Mendeleev and Mayer developed . . . . . . . .?
A)
Metallurgy
B)
Periodic Table of Contents
C)
Atomic structure
D)
Discovery of elements
Answer & Solution
Answer: Option
B
10
According to Newlands rule of octaves, . . . . . . . . which resembles cobalt and nickel in properties, is kept far away from these elements.
A)
Al
B)
Fe
C)
Mn
D)
Mg
Answer & Solution
Answer: Option
B
