|
2.
|
According
to the Lewis dot symbol, the number of electrons in the outermost shell of
gallium is _____.
|
|
|
A)
|
2
|
|
|
B)
|
4
|
|
|
C)
|
5
|
|
|
D)
|
3
|
|
|
3.
|
The
element having five electrons in the valence shell is _____.
|
|
|
A)
|
Al
|
|
|
B)
|
N
|
|
|
C)
|
S
|
|
|
D)
|
Se
|
|
|
4.
|
The
element not having seven electrons in the outermost shell is _____.
|
|
|
A)
|
Cl
|
|
|
B)
|
At
|
|
|
C)
|
F
|
|
|
D)
|
Tl
|
|
|
6.
|
The
ion not having Octet configuration in the outermost shell is _____.
|
|
|
A)
|
Sr2+
|
|
|
B)
|
Fe2+
|
|
|
C)
|
Mg2+
|
|
|
D)
|
S2–
|
|
|
7.
|
Al3+
is not isoelectronic with _____.
|
|
|
A)
|
Mg2+
|
|
|
B)
|
F–
|
|
|
C)
|
Na+
|
|
|
D)
|
Ca2+
|
|
|
8.
|
The
most stable ion of the following is _____.
|
|
|
A)
|
O–
|
|
|
B)
|
Bi3+
|
|
|
C)
|
Si3+
|
|
|
D)
|
Hg3+
|
|
|
11.
|
An
ionic compound of the following is _____.
|
|
|
A)
|
MgO
|
|
|
B)
|
Cl2O7
|
|
|
C)
|
NO
|
|
|
D)
|
SiO2
|
|
|
18.
|
Which
of the following will form an ionic compound?
|
|
|
A)
|
Mg
and F
|
|
|
B)
|
Si
and O
|
|
|
C)
|
C
and O
|
|
|
D)
|
Cl
and O
|
|
|
19.
|
Which
of the following will form a covalent compound?
|
|
|
A)
|
Mg
and I
|
|
|
B)
|
B
and F
|
|
|
C)
|
Cs
and F
|
|
|
D)
|
Ba
and Cl
|
|
|
28.
|
Which
of the following compounds contains a lone pair of electrons?
|
|
|
A)
|
BH3
|
|
|
B)
|
NH3
|
|
|
C)
|
CH4
|
|
|
D)
|
AlH3
|
|
|
29.
|
How
many lone pairs are there at bromine in HBr?
|
|
|
A)
|
6
|
|
|
B)
|
1
|
|
|
C)
|
2
|
|
|
D)
|
3
|
|
|
30.
|
The
molecule containing two lone pairs of electrons is _____.
|
|
|
A)
|
PH3
|
|
|
B)
|
H2S
|
|
|
C)
|
HCl
|
|
|
D)
|
BH3
|
|
|
31.
|
The
molecule containing no lone pairs of electrons is _____.
|
|
|
A)
|
CH4
|
|
|
B)
|
H2O
|
|
|
C)
|
HI
|
|
|
D)
|
PH3
|
|
|
32.
|
The
molecule containing a triple bond of the following is _____.
|
|
|
A)
|
ethylene
|
|
|
B)
|
ethane
|
|
|
C)
|
methane
|
|
|
D)
|
acetylene
|
|
|
34.
|
The
carbon–carbon bond is strongest in _____.
|
|
|
A)
|
ethane
|
|
|
B)
|
ethylene
|
|
|
C)
|
propane
|
|
|
D)
|
acetylene
|
|
|
35.
|
The
carbon–carbon bond distance is shortest in _____.
|
|
|
A)
|
benzene
|
|
|
B)
|
cyclohexane
|
|
|
C)
|
ethylene
|
|
|
D)
|
acetylene
|
|
|
37.
|
The
least electronegative element of the following is _____.
|
|
|
A)
|
Cs
|
|
|
B)
|
Ca
|
|
|
C)
|
F
|
|
|
D)
|
C
|
|
|
39.
|
An
example of a polar covalent molecule is _____.
|
|
|
A)
|
CH4
|
|
|
B)
|
HCl
|
|
|
C)
|
Br2
|
|
|
D)
|
N2
|
|
|
40.
|
The
molecule, which is non-polar of the following, is _____.
|
|
|
A)
|
HCl
|
|
|
B)
|
H2
|
|
|
C)
|
CO
|
|
|
D)
|
NO2
|
|
|
41.
|
The
most ionic compound of the following is _____.
|
|
|
A)
|
LiCl
|
|
|
B)
|
BeCl2
|
|
|
C)
|
KCl
|
|
|
D)
|
CCl4
|
|
|
50.
|
Which
of the following bonds is most ionic in nature?
|
|
|
A)
|
Cl–F
|
|
|
B)
|
K–O
|
|
|
C)
|
LiF
|
|
|
D)
|
LiI
|
|
|
51.
|
The
chemical bond most covalent in nature of the following is _____.
|
|
|
A)
|
C–H
|
|
|
B)
|
C–Cl
|
|
|
C)
|
H–F
|
|
|
D)
|
O–H
|
|
|
52.
|
The
electronegativity difference between carbon and fluorine is _____.
|
|
|
A)
|
2.5
|
|
|
B)
|
1.5
|
|
|
C)
|
0.5
|
|
|
D)
|
3.5
|
|
|
53.
|
The
ionic bond of the following is _____.
|
|
|
A)
|
Cs–F
|
|
|
B)
|
N–H
|
|
|
C)
|
Si–Cl
|
|
|
D)
|
N–B
|
|
|
54.
|
The
ionic compound of the following is _____.
|
|
|
A)
|
KF
|
|
|
B)
|
F2O
|
|
|
C)
|
ICl
|
|
|
D)
|
CO2
|
|
|
55.
|
Fluorine
will form a covalent compound with _____.
|
|
|
A)
|
Mg
|
|
|
B)
|
Ca
|
|
|
C)
|
S
|
|
|
D)
|
Na
|
|
|
56.
|
The
covalent compound of the following is _____.
|
|
|
A)
|
KH
|
|
|
B)
|
Na2O
|
|
|
C)
|
CCl4
|
|
|
D)
|
RbCl
|
|
|
58.
|
Which
of the following bonds is not possible?
|
|
|
A)
|
C
= C
|
|
|
B)
|
C
= H
|
|
|
C)
|
C
º
C
|
|
|
D)
|
C
= O
|
|
|
64.
|
The
molecule not obeying the octet rule of the following is _____.
|
|
|
A)
|
SbCl5
|
|
|
B)
|
PCl3
|
|
|
C)
|
SiH4
|
|
|
D)
|
Cl2
|
|
|
79.
|
NH4+
is isoelectronic with _____.
|
|
|
A)
|
NH3
|
|
|
B)
|
NO3–
|
|
|
C)
|
AlCl4–
|
|
|
D)
|
AlCl3
|
|
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