CHAPTER # 5 Halogens and Noble Gases MCQs
1. Which
is the most volatile compound?
(A)
HI (B) HCI
(C)
HBr (D) HF
2. Which
one is the anhydride of HCIO4 ?
(A)
CI2O (B)
CIO2
(C)
CI2O6
(D) CI2O7
3. Which
of the following halogens does not form
its oxyacids ?
(A)
Fluorine (B) Chlorine
(C)
Bromine (D) Iodine
4. Bromine
is obtained on a commercial scale from
(A)
Caliche (B) Carnallite (C)
Common salt (D) Cryolite.
5. Iodine
deficiency in diet is known to cause
(A)
Beriberi (B)
Goitre
(C)
Rickets (D)
Night blindness
6. Which
one of the halogen acid is a liquid ?
(A)
HF (B)
HCI (B)
HBr (D) HI.
7. Which
of the following acid is weakest
(A)
HCIO (B)
HBr (C)
HCIO3
(D) HCI.
8. In
which of the following, oxygen has +2
oxidation number ?
(A)
F2O
(B) CI2O
(C)
Na2O2 (D) Na2O.
9. Fluorine
does not show positive oxidation states due to the absence of
(A)
d-orbitals (B)
s-orbitals
(C)
p-orbitals (D)
None
10. Which
of the following has greatest reducing
power?
(A)
HI (B) HBr (C)
HCI (D) HI.
11. Bad
conductor of electricity is
(A)
H2F2 (B) HCI
(C)
HBr (D) HI
12. Bleaching
power is obtained by the action chlorine gas and
(A)
Dilute solution of Ca(OH)2
(B)
Concentrated solution of
Ca(OH)2
(C)
Dry CaO
(D)
Dry slaked lime.
13. Mark
the element which shows only one oxidation state in its compounds
(A) F (B) CI
(C)
Br (B) I.
14. Which
of the following halogens has the
highest bond energy ?
(A)
F2 (B) CI2 (C)
Br2 (D) I2.
15. Which
halogen is most electropositive ?
(A)
F (B) CI (C)
Br (D) I.
16. Which
one of the following is the true covalent
oxide of iodine ?
(A)
I2O4 (B) I2O5
(B)
I2O7 (D) I2O9
17. Which
of the following halogen oxides is ionic?
(A)
CIO2 (B) BrO2
(C)
I2O5
(D) I4O9
18. Which
of the following hydrogen halide has the highest
boiling point ?
(A)
HF (B) HCI (C)
HBr (D) HI.
19. Which
of the following is a false statement ?
(A)
Hydrogens are strong
oxidizing agents
(B)
Halogens show only –1
oxidation state
(C)
HF molecules form
intermolecular
hydrogen bonding
(D)
Fluorine is highly
reactive.
20.
As the atomic number of halogens
increases, the halogens
(A)
Lose the outermost
electrons less readily
(B)
Become lighter in colour
(C)
Become less denser
(D)
Gain electrons less
readily.
21. Which
statement is correct about halogens ?
(A)
They are all diatomic and
form univalent ions
(B)
They are all capable of
exhibiting several
oxidation states
(C)
They are all diatomic and
form divalent ion
(D)
They can mutually displace
each other
from the
solution of their compounds with
metals.
22. Which
has the highest molar heat of vaporization ?
(A)
HF (B) HCI (C)
HBr (D) HI.
23. Which
one of the following reacts with glass ?
(A)
H2SO4
(B) HF
(C)
HNO3 (D) K2Cr2O7
24. Strongest
hydrogen bonding is shown by
(A)
Water (B) Ammonia
(C)
Hydrogen fluoride (D) Hydrogen sulphide.
25. Fluorine
is a better oxidizing agent than Br2. It is
due to
(A) Small size of fluorine
(B) More electron repulsion in fluorine (C)
More eletronegativity of fluorine (D)
Non metallic nature of fluorine.
26.
The element which liberated O2
from water is
(A)
P (B) N (C)
F (D) I.
27. Ozonised
oxygen can be obtained from H2O by the action of
(A)
Conc. H2SO4
(B) KMnO4
(C)
MnO (D) F2
28.
Which one of the following is most
basic ?
(A)
F- (B) CI-
(C)
Br- (D) I-
29. Which
one of the following elements can have
both positive and negative oxidation state?
(A) F (B) I (C) Li (D) He.
30. Least
chemical activity is shown by
(A)
NH3 (B) CH4
(C)
Ar (D) H2SO4.
31. In
discharge tube, noon glows
(A)
Bluish (B) Reddish
(C)
Pinkish (D) Greenish
32. Xef2 molecule is
(A)
Linear (B) Trigonal
planar (C)
Pyramidal (D) Square planar.
33. The
forces acting between noble gas atoms are
(A)
Vander Waals forces
(B)
Ion-dipole forces
(C)
London disperslon
forces (D)
Magnetic forces.
34. Percentage
of Ar in air is about
(A)
1% (B) 2%
(C0
3% (D) 4%
35. The
structure of XeF6 is
(A)
Distorted octahedral
(B)
Pyramidal
(C)
Tetrahedral
(D)
None of the above
36. The
noble gas was first time discovered by
(A) Cavendish (B) William Ramsay (C)
Lockyer (D) Frankland.
37. The
coloured discharge tubes for advertisement mainly contain
(A)
Xenon (B) Helium
(B)
Neon (D) ARGON
38.
Which of the following noble
gases does not have an octet of electrons in its outermost shell
?
(A) Neon (B) Radon
(C) Argon (D) Helium
39. The
lowest boiling point of helium is due to its
(A)
Inertness
(B)
Gaseous nature
(C)
High Polaris ability
(D)
Weak Vander Waals forces
b/w atoms
40.
Which member of group VII A
combines with one more halogen?
a) Cl b)
F
c) Br
d)
I
41.
The interhalogen formed by
iodine requires fluorine atoms
a) 3 b)
5
c) 7 d)
8
42.
Which one halogen directly
reacts with noble gas?
a) F b)
Cl
c) Br
d)
I
43.
Which type of
interhalogenis formed by Bromine?
a) Br – Cl b) Br – F3
b) Br – F5 d)
Br – I 7
44.
Iodine occurs as iodate
in
a) Chile salt peter b)
Clauber’s salt
c)
Blue vitriol d)
Oil of vitriol
45.
Which one hydride has
greater ionic character and had H – bond?
a) HF b) HBr
c)
HCl d)
HI
46.
Chlorine reacts with hot
solution of NaOH to form
a) NaCl b) NaClO3
c)
NaClO d)
All of these
47.
Fluorine directly combines
with noble gases
a) Kr b)
Xe
c) Rn
d)
All of these
48.
The density of pure liquid
HF is less then water due to
a) Covalent bond formations
b) High electron affinity
c) Absence of three dimensional net work of H – bond
d) Presence of three dimensional net work of H – bond
49.
The order of increasing
dissociation of HX at 1000oC is
a) HI (33%) > HBr (0.5%) > HCl (0.014%) > HF (0%)
b) HBr > HI > HF > HCl
c) HCl > HBr > HI > HF
d) HF > HCl > HBr > HI
50.
The halogen which form
unstable oxides is
a) F b)
Cl
c) Br
d)
I
51.
The most recently prepared
oxyacid of halogen is
a) HOCl b)
HBrO3
c)
HIO d)
HOF
52.
The increasing order of
acidity and oxidizing power of Oxyacids due to increasing number of oxygen
atoms is
a) HXO > HXO2 > HXO3 > HXO4
b) HXO4 > HXO3 > HXO2 >
HXO
c) HXO3 > HXO2 > HXO4 >
HXO
d) None of these
53.
The average available
chlorine in bleaching powder is
a) 30 – 35% b)
35 – 40%
c) 40
– 45% d)
45 – 50%
54.
Which one is false for
bleaching powder?
a) Highly soluble in water
b) Light yellow color powder
c) Oxidizing agent
d) Release Cl2 gas by reaction with dilute acids
55.
Sea weeds are important
sources of
a) F b)
Cl
c) Br
d)
I
56.
The acid used for etching
glass is
a) HCl b) HF
c)
HNO3 d)
HClO4
57.
Which one interhalogen can
further combine with fluorine?
a) F – Cl b)
ClF3
c)
BrF5 d) IF5
58.
Which statement is true?
a) Except F2O, the oxides of all halogen are endothermic
compounds
b) The higher oxides of halogen are more stable than lower oxides
c) The bond in the halogen oxides are largely covalent due to
similarities in electronegativity d) All of these
59.
Iodine is highly soluble
in
a) Solution of Kl b) Alcohol
c)
CS2 d)
All of these
60.
HF is not preserved in
glass bottle because
a) It reacts with SiO2 of the glass
b) It reacts with the Al2O3 of the
composition
c) It reacts with the Na2O of the composition
d) It reacts with the visible part of light
61.
Fluorine can be transported
in a special container made up of
a) Aluminum b)
Steel
c)
Glass d)
Carbon steel
62.
Chlorine can be easily
liquefied and is usually marketed in
a) Steel cylinders
b) Iron cylinders
c) Carbon steel cylinders
d) Glass cylinders
63.
Halogen do not occur free
in nature because they
a) Are salt producer
b) Are highly reactive
c) Has seven electrons in their valence shell
d) Are non metals
64.
Xenon trioxide is formed
by
a) Hydrolysis of xenon hexafluoride
b) Hydrolysis of barium per xenate
c) Hydrolysis of xeondifloride
d) None of these
65.
The known fluorides of
xenon are
a) XeF2 b) XeF4
c)
XeF6 d) All of the above
66.
Mixture of 80% helium and
20% oxygen is used for
a) Breathing air by seas divers
b) Breathing by patient
c) Breathing by fishes
d) All of these
67.
Tyres of large aeroplane
contain
a) He b)
Ne
c) Ar
d)
Kr
68.
Which xenon fluoride is
impossible?
a) XeF2 b)
XeF4
c)
XeF6 d) XeF3
69.
The type of hybridization
does the oxygen has in OF2 is
a) SP2 b)
d2SP3
c) SP3
d)
dSP3
70.
The gas that will liquefy
with most difficulty is
a) He b)
CO2
c)
NH3 d) SO2
71.
Which of the following is
radioactive?
a) Cl b)
Br
c)
I d)
At
72.
The electron affinity of
halogens is of the order
a) F < Cl > Br > I b)
F < Cl < Br < I
c)
Cl < F < Br < I d) I
< Br < F < Cl
73.
Which of the following
hydride of halogen is thermally most
stable?
a) HF b) HCl
c)
HBr d)
HI
74.
In which of the following
bromine has an oxidation state of + 4?
a) Br2O b) BrO2
c)
BrO3 d) None
75.
Electrolysis of Brine
produces _______
a) Chlorine b)
Oxygen
c)
H2S d) Nitrogen
76.
In which of the following
oxyacids, chlorine has an oxidation state of +3?
a) HClO b)
HClO2
c)
HClO3 d)
HClO4
77.
The process based on the
oxidation of
hydrochloric acid with oxygen is ______
a) Nelson’s cell b) Contact process
c)
Down’s process d) Deacon’s process
78.
Chlorine gas is ______ in
color.
a) Yellow b)
Greenish Yellow
c)
Violet d)
Blue
79.
To kill bacterial, moist of
the drinking water is
treated
with _______
a) Nitrogen b)
Carbon dioxide
c)
Chlorine d)
Hydrogen sulphide
80.
Phosgene is the common name
of _______
a) Carbon dioxide and phosphate
b) Phosphoryle chloride
c) Carbonyle chloride
d) Carbon tetrachloride
81.
Hydrofluoride acid is
_________
a) A powerful oxidizing agent
b) A weak acid
c) A strong acid
d) A good reducing agent
82.
Bleaching powder is
obtained by the
interaction
of Cl2 and _______
a) Slaked lime
b) Conc. Solution of Mg(OH)2
c) Dry CaO
d) Dry slaked lime
83.
The element which liberates
O2 form water is
a) P b)
N
c)
F d)
I
84.
Which forms maximum
compounds with xenon?
a) F b)
Cl
c)
Br d)
I
85.
Which of the following rare
gases is not present in the atmosphere?
a)
He b)
Xe
c) Kr
d)
Rn
86.
The structure of XeOF4
is
a)
Tetrahedral b) Square
pyramidal
c)
Distorted d) Irregular pentagonal
87.
Which of the following
fluorides of xenon is not observed?
a)
Xef b)
XeF2
c)
XeF4 d) XeF6
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