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Halogens and Noble Gases - 1
1.
Dissociation energy of F
2
is ______________ then Cl
2
and Br
2
.
a) Lower
b) Increase
c) High
d) Decreases
2.
___________ Lattice energies of ionic fluorides are responsible for their insolubility in water.
a) Decreases
b) High
c) Lower
d) Increase
3.
The oxidizing power of halogens ______________ with increase in atomic number.
a) Lower
b) Bromine
c) High
d) Decreases
4.
HF is less visous than water due to ________ .
a) Carbonmonoxide
b) Very Fast, Explosive
c) Absence of three Dimensional network of H-bonds
d) Radio active decay
5.
Reaction of hydrogen with fluorine is _______________ and ____________.
a) Hydrofluoric acid
b) Very Fast, Explosive
c) Radio active decay
d) Earth quake prediction
6.
Melting points, boiling points, heats of fusion + heats of vaporization _________ regularly from Hu to HI.
a) Increase
b) Decreases
c) Lower
d) High
7.
O
3
F
2
decomposes to give Oxygen and _____________.
a) XeF
6
b) U
2
O
7
c) O
2
F
2
d) 4O
8.
______________ is the anhydride of perchloric acid.
a) XeF
6
b) O
2
F
2
c) U
2
O
7
d) +2 to +8
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