SAT Chemistry - Chemical Bonding and Molecular Structure
Exam Duration: 45 Mins Total Questions : 30
The energy in a molecule is less than the atoms.
- (a)
True
- (b)
False
- (c)
Can't say
- (d)
None of these
The gases like oxygen, nitrogen, are the result of:
- (a)
Chemical bond
- (b)
Covalent bond
- (c)
Ionic bond
- (d)
Co-ordinate covalent
MgO is an example of:
- (a)
Chemical bond
- (b)
Covalent bond
- (c)
Ionic bond
- (d)
Co-ordinate covalent
Ionic compounds don't possess molecular formula.
- (a)
True
- (b)
False
- (c)
Can't say
- (d)
None of these
An ionic compound forms the molecules of high molecular weight.
- (a)
True
- (b)
False
- (c)
Can't say
- (d)
None of these
CI- contains electrons in it:
- (a)
1
- (b)
2
- (c)
7
- (d)
8
Metals are solid except bromine:
- (a)
True
- (b)
False
- (c)
Can't say
- (d)
None of these
The bond between two identical non-metal atoms has a pair of electrons:
- (a)
unequally shared between the two
- (b)
transferred fully from one atom to another
- (c)
with identical spins
- (d)
equally shared between them
In which of the following processes will energy be absorbed?
- (a)
Separating an electron from an electron
- (b)
Separating a proton from a proton.
- (c)
Separating a neutron from a neutron
- (d)
Separating an electron from a neutral atom
An atom which has gained one electron will be a
- (a)
monopositive ion.
- (b)
dipositive ion
- (c)
neutral atom.
- (d)
negatively charged ion
The formation of a chemical bond is associated with
- (a)
a decrease in potential energy
- (b)
an increase in potential energy
- (c)
no change in potential energy
- (d)
first a decrease and then an increase in potential energy.
The electronic configuration of four elements P, Q, Rand S are given below:
(P)1s2 2S2 2p4
(Q)1s2 2s22p6 3s1
(R)1s2 2s22p6 3s23s5
(S)1s2 2s22p63s2
The ionic compounds that can be formed between these elements are
- (a)
P2Q, SP, QR, S2R
- (b)
PQ, SP, QR, SR
- (c)
Q2P, SP, QR, SR,
- (d)
PQ, S2P, Q2R, SR
A bond with a maximum covalent character between two non-metallic elements is found between
- (a)
identical atoms
- (b)
chemically similar atoms
- (c)
atoms of the same size
- (d)
atoms of widely different electronegativities.
In which molecule the bond angle is maximum
- (a)
CH4
- (b)
H2O
- (c)
H2S
- (d)
CO2
π bonding occurs in each of the following except
- (a)
CO2
- (b)
C2H4
- (c)
CH4
- (d)
C6H6
Which of the following molecules contain ionic linkages?
- (a)
AlCl3
- (b)
BF3
- (c)
CCl4
- (d)
MgCl2
Which of the following statements about the molecule N02 is NOT correct?
- (a)
The bonds within the molecule are polar
- (b)
The atoms within the molecule are colinear
- (c)
The molecule contains nitrogen oxygen bonds of equal le
- (d)
The molecule contains on odd number of electrons
A sigma bond is NOT formed by the overlapping of
- (a)
s-s orbitals
- (b)
p-p orbitals along their axis
- (c)
p-p orbitals in side ways manner
- (d)
s-s, s-p or p-p orbitals in end-to-end manner.
Element X is strongly electropositive and Y is strongly electronegative. Both are univalent. The compound formed would be
- (a)
X+ Y-
- (b)
X - Y
- (c)
X- Y+
- (d)
X ⟶ Y
A molecule possessing dipole moment is
- (a)
CH4
- (b)
H2O
- (c)
BF3
- (d)
CO2
The molecule that has linear structure is:
- (a)
CO2
- (b)
NO2-
- (c)
SO2
- (d)
SiO2
The high boiling point of water is due to:
- (a)
its high specific heat
- (b)
hydrogen bonding between the molecules
- (c)
weak dissociation of water molecules
- (d)
its high dielectric constant
Acetylene molecule contains
- (a)
5 sigma bonds
- (b)
4 sigma and 1 n-bond
- (c)
3 sigma and 2 n-bonds
- (d)
2 sigma and 3 n-bonds
Which of the following has a tetrahedral structure
- (a)
NH3
- (b)
XeF4
- (c)
NH4+
- (d)
SF4
Pick out the isoelectronic structures from the following
(i) CH3+ (ii) H2O+
(iii) NH3 (iv) CH3
- (a)
(i) and (ii)
- (b)
(i) and (iv)
- (c)
(i) and (iii)
- (d)
(ii), (iii) and (iv)
BCl3 is a planar molecule whereas NCl3 is pyramidal because:
- (a)
nitrogen atom is smaller than boron atom
- (b)
BCl3 has no lone pair of electrons whereas NCl3 has a lone pair of electrons
- (c)
N-Cl bond is more covalent than B-Cl bond
- (d)
B-Cl bond is more polar than N-Cl bond
Which of the followng molecules is planar?
- (a)
XeF4
- (b)
NF3
- (c)
SiF4
- (d)
SF4
An element with configuration 1s2, 252 sP6, 352 3p3 is:
- (a)
trivalent
- (b)
tetravalent
- (c)
pentavalent
- (d)
both tri and pentavalent
Which of the following has highest lattice energy?
- (a)
KF
- (b)
NaF
- (c)
CsF
- (d)
RbF
Which of the following is not isoelectronic of the other species?
- (a)
N2O
- (b)
HNCO
- (c)
NO2
- (d)
HN3
