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Periodic Classification of Elements

Winmeen WinmeenSeptember 2, 2018
0 435 Less than a minute

Periodic Classification of Elements

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Question 1
A plot of square rod of frequency of X-rays emitted by a metal against atomic number gives .................
A
a straight line
B
a curve
C
a straight line parallel to X axis
D
a straight line parallel to Y axis
Question 2
The basis for periodic classification of the elements as suggested by Mosley is ........
A
atomic weight
B
valency
C
atomic number
D
physical and chemical properties
Question 3
In the long form of periodic table.
  1. Elements have been arranged in increasing order of atomic weight.
  2. Elements have been arranged in increasing order of atomic number.
  3. There are seven periods and 18 groups
  4. There are eight periods and 19 groups
A
1,2,3
B
2 and 3
C
1, 3
D
3 and 4
Question 4
The third period consists of elements presents having atomic number.
A
1,2
B
8
C
11 to 18
D
19 to 36
Question 5
The maximum number of elements present in third period is ...............
A
2
B
8
C
18
D
36
Question 6
The fourth period of the long form of periodic table.
A
contain eight elements
B
contains 8 normal elements, 10 transition elements and 14 inner transition elements
C
contains elements from rubidium to xenon
D
contains elements from potassium to krypton
Question 7
Elements having atomic numbers 55 to 86 are present ..................
A
fourth period
B
fifth period
C
sixth period
D
seventh period
Question 8
In the long form of periodic table alkali and alkaline earth metals are present in respectively .....................
A
first group and second group
B
second group and first group
C
in first group only
D
in second group only
Question 9
Group 3 to 12 in the long form of periodic table are called .................
A
respective elements
B
transition elements
C
inner transition elements
D
inert gases
Question 10
Choose the incorrect statement.
A
The chemical properties of element change along a period
B
The elements present in a group have identical chemical properties
C
The size of the atom increases along a period
D
The size of the atom increases along a group
Question 11
...................... are called a coinage metals
A
Copper, Silver and Gold
B
Copper, Brass and Gold
C
Copper, Brass and Silver
D
Copper Silver and Aluminium
Question 12
Which metal is a constitute of haemoglobin?
A
zn
B
Fe
C
Ca
D
Co
Question 13
Given from pairs, identify the one which is an ore and the other a mineral.
A
Bauxite, Cryolite
B
Galena, Zinc blend
C
Haematic, Clay
D
Bauxite and Zinc blende
Question 14
A metal A is not affected by dry air on heating to 800o it burns brightly. It is a powerful reducing agent. It is used in alumina thermic process. The metal A is ..............
A
Fe
B
Zn
C
Al
D
Cu
Question 15
Matte is ................
A
a mixture of cuprous sulphide and ferrous sulphide
B
a mixture of cupric sulphide and ferrous sulphide
C
a mixture of cuprous sulphide and ferrous sulphate
D
a mixture of cupric sulphide and ferrous sulphate
Question 16
Copper metal is heated with concentrated nitric acid. The gas evolved is .............
A
nitrous oxide
B
nitric oxide
C
nitrogen dioxide
D
sulphurdioxide
Question 17
Choose the correct statement from the following:
A
Haematite ore is concentrated by froth flotation process
B
Haematite ore is concentrated by gravity separation
C
Copper pyrites is concentrated by gravity separation
D
Haematite ore is concentrated by leaching
Question 18
Which of the following metals is purified by electrolytic refining?
A
Fe
B
Cu
C
Zn
D
Hg
Question 19
Number of periods in modern periodic table is ........................
A
7
B
17
C
18
D
8
Question 20
An amalgam is an alloy of metal with .........................
A
carbon
B
hydrogen
C
mercury
D
gold
Question 21
Atomic number of iron is 26. Its electronic configuration is ..................
A
2, 8, 8, 2
B
2, 8, 8, 4
C
2, 8, 14, 2
D
2, 8, 14, 4
Question 22
Bauxite is used to extract aluminium. It can be turned as .................
A
ore
B
mineral
C
flux
D
slag
Question 23
To design the body of the aircraft, ................... alloys are used.
A
iron
B
gold
C
silver
D
aluminium
Question 24
A process employed for the concentration of sulphide ore is ....................
A
gravity separation
B
forth floatation
C
magnetic separation
D
chemical method
Question 25
modern periodic law states that the physical and chemical properties of elements are the periodic functions of their ........................
A
atomic weight
B
mass number
C
atomic number
D
neutron number
Question 26
Second group of elements are called ....................
A
alkali metals
B
alkaline earth metals
C
transition elements
D
minor transition elements
Question 27
The ore FeS2 of iron is named as .....................
A
red haematite
B
iron pyrites
C
magnetite
D
cuprite
Question 28
Air and water are necessary for ................... of iron.
A
oxidation
B
reduction
C
decomposition
D
rusting
Question 29
For making electromagnets, ................... is used.
A
pig iron
B
wrought iron
C
steel
D
amalgam
Question 30
In the correction of iron, carbonic acid acts as ......................
A
electrolyte
B
cathode
C
anode
D
an angent
Question 31
.................. alloy of  aluminium is used to make scientific instruments.
A
Magnalium
B
Duralumin
C
Brass
D
Bronze
Question 32
Galena is the sulphide ore of ......................
A
aluminium
B
iron
C
copper
D
lead
Question 33
............. is the substance added to the ore to reduce the fusion temperature.
A
flux
B
slag
C
gangue
D
mineral
Question 34
The metal ................ plays a vital role in nuclear reactions releasing enormous energy called nuclear energy.
A
copper
B
chromium
C
uranium
D
zirconium
Question 35
The ore of Aluminium is ..................
A
Haematite
B
Magnetite
C
Bauxite
D
Siderite
Question 36
Bauxite is the ore of .................
A
Aluminium
B
Sodium
C
Copper
D
Iron
Question 37
First period contains only two elements, one is hydrogen and the other is .............
A
Nitrogen
B
Oxygen
C
Helium
D
Neon
Question 38
A
A
B
B
C
C
D
D
Question 39
A
A
B
B
C
C
D
D
Question 40
A
A
B
B
C
C
D
D
Question 41
A
A
B
B
C
C
D
D
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Winmeen WinmeenSeptember 2, 2018
0 435 Less than a minute
Winmeen

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