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ECAT Chemistry Chapter 16 The Halogens and The Noble Gases Online Test MCQs With Answers
Question # 1
An element that has a high ionization energy and tends to be chemically inactive would most likely to be:
Choose an answer
an alkali metal
a transition element
a noble gas
a halogen
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Question # 2
The noble gases are
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Mono atomio
Diatomic
Polyatomic
All
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Question # 3
Bleaching powder may be produced by passing chlorine over
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Calcium carbonate
Hydrated calcium sulphate
Anhydrous calcium sulphate
Calcium hydroxide
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Question # 4
The strongest hydrogen bond is in
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HF
HCl
HBr
Hl
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Question # 5
Which is the strongest acid?
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HClO
HClO
2
HClO
3
HClO
4
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Question # 6
An element that has a high ionization energy and tends to be chemically inactive would most likely to be
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an alkali metal
a transition element
a noble gas
a halogen
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Question # 7
Nobel gases are placed group:
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Group IV-A
Group V-A
Group VI-A
Group VII-A
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Question # 8
Which of the following represents the correct electronic configuration of the outermost energy level of an element of zero (VIIA) group in the ground state?
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s
2
p
2
s
2
p
4
s
2
p
5
s
2
p
6
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Question # 9
Halogens are called.
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salt former
Light bearing
copper forming
None of these
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Question # 10
The strongest acid is
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HF
HCl
HBr
HI
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Question # 11
Which is used in arc welding and cutting?
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He
Ne
Ar
Kr
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Question # 12
Which halogen occurs naturally in a positive oxidation state?
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Fluorine
Chlorine
Bromine
Iodine
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Question # 13
Colour of chlorine is
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Pale yellow
Greenish yellow
Red brown
Greyish black
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Question # 14
A property which differs fluorine from the other halogens?
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Direct combination with inert gases
Uninegative
Diatomic
ns
2
, np
5
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Question # 15
Perchloric acid can be stored in solution form
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47%
57%
67%
77%
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Question # 16
Oxidation state of fluorine is:
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+1
+2
-1
-2
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Question # 17
Which is used as cooling medium in nuclear reactors?
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He
Ne
Ar
Kr
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Question # 18
Which has complete valence shell?
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C
N
O
Ne
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Question # 19
Hydrogen bond is the strongest between the molecules of
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HF
HCl
HBr
HI
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Question # 20
Which noble gas is used in mixture used for breathing by divers?
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Cl
2
NH
3
CO
2
He
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Question # 21
Smell of halogen is
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Fruity
Sweet
Irritating
Rotten egg
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Question # 22
Which halogen has Iustrous shining?
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F
2
Cl
2
Br
2
I
2
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Question # 23
I
2
O
5
is used for quantitative study of
Choose an answer
CO
2
NO
2
NO
CO
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Question # 24
Astatine belongs to group
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I-A
II-A
III-A
VII-A
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Question # 25
Second most element in the universe is
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He
Ne
Ar
Kr
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Question # 26
Bleaching powder is agent:
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Dehydrating
Oxidazing
reducing
all
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Question # 27
Gaseous HF exists in the form of
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Monomers
Cyclic hexamers
As single entity
Both a and b
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Question # 28
Which halogen has maximum Van-der Waal's forces?
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F
2
Cl
2
Br
2
I
2
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Question # 29
Corrosion proof parts of machinery are prepared from
Choose an answer
Iron
Copper
Plastic
Teflon
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Question # 30
Chlorin heptoxide reacts with water to form:
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Hypochlorous acid
Chloric acid
Perchloric acid
Chlorine and oxygen
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