Periodic Classification of Elements

Winmeen

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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.

Elements have been arranged in increasing order of atomic weight.
Elements have been arranged in increasing order of atomic number.
There are seven periods and 18 groups
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 800^o 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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Periodic Classification of Elements

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